feat(compiler): transform module aliases in emitted js, typedefs

[alicewriteswrongs]

This implements a transformer which is very similar to the one added
in #3523 but which is run earlier in the build process and which can
therefore rewrite aliased paths in both emitted JS and typedef files.

This matters if the user has the generateTypeDeclarations option set
to true on one of their output targets.

The new behavior implemented here, however, is no longer specific to a
particular output target, and applies to all TypeScript code which runs
through Stencil. Accordingly, the behavior is opt-in, and is controlled
by a new configuration value, transformAliasedImportPaths which
defaults to false.

Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Build (npm run build) was run locally and any changes were pushed
• Unit tests (npm test) were run locally and passed
• E2E Tests (npm run test.karma.prod) were run locally and passed
• Prettier (npm run prettier) was run locally and passed

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Currently if you use paths in tsconfig.json to set up module aliases then these are not transpiled in the .d.ts files that Stencil emits for individual components. This is unfortunate! This PR introduces a transformer into the typescript compiler which will transform these paths from something like @utils to a relative path from the importing module to the importee. This will allow the build output to be used directly without any need for further transformation.

GitHub Issue Number: #3788

What is the new behavior?

Now such imports will be transformed at build time, so that emitted JS files and .d.ts files will have a resolved relative path to the module they're importing.

Because this behavior

Does this introduce a breaking change?

• Yes
• No

Testing

The best way to test this is to check out the reproduction case on the linked issue and try building it with this change installed. You'll also need to add transformAliasedImportPaths on the stencil config.

With that reproduction it might be helpful to also do something like:

cd /tmp
mkdir stencil-alias-test && cd stencil-alias-test
git init

then copy the contents of dist over and commit them before installing Stencil built from this branch. Then you can install Stencil from this branch and repeat the procedure to see a diff of the changes its produced.

Other information

[github-actions]

--strictNullChecks error report

Typechecking with --strictNullChecks resulted in 2099 errors on this branch.

Unfortunately, it looks like that's an increase of 7 over main 😞.

Violations Not on `main` (may be more than the count above)

Path	Location	Error	Message
src/cli/run.ts	(148, 63)	TS2345	Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'.
src/cli/run.ts	(160, 47)	TS2345	Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'.
src/cli/run.ts	(175, 63)	TS2345	Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'.
src/cli/run.ts	(176, 14)	TS18048	'config.sys' is possibly 'undefined'.
src/compiler/config/test/validate-config.spec.ts	(371, 12)	TS18048	'config.extras' is possibly 'undefined'.
src/compiler/config/test/validate-config.spec.ts	(373, 12)	TS18048	'config.extras' is possibly 'undefined'.
src/compiler/config/test/validate-config.spec.ts	(374, 12)	TS18048	'config.extras' is possibly 'undefined'.
src/compiler/config/test/validate-config.spec.ts	(376, 12)	TS18048	'config.extras' is possibly 'undefined'.
src/compiler/config/test/validate-config.spec.ts	(377, 12)	TS18048	'config.extras' is possibly 'undefined'.
src/compiler/config/test/validate-config.spec.ts	(379, 12)	TS18048	'config.extras' is possibly 'undefined'.
src/compiler/config/test/validate-config.spec.ts	(380, 12)	TS18048	'config.extras' is possibly 'undefined'.
src/compiler/config/test/validate-config.spec.ts	(381, 12)	TS18048	'config.extras' is possibly 'undefined'.
src/compiler/config/test/validate-config.spec.ts	(382, 12)	TS18048	'config.extras' is possibly 'undefined'.
src/compiler/config/transpile-options.ts	(72, 71)	TS2345	Argument of type 'Set<string | null>' is not assignable to parameter of type 'Set'. Type 'string | null' is not assignable to type 'string'. Type 'null' is not assignable to type 'string'.
src/compiler/config/transpile-options.ts	(78, 47)	TS2345	Argument of type 'Set<string | null>' is not assignable to parameter of type 'Set'.
src/compiler/config/transpile-options.ts	(126, 5)	TS2322	Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/config/transpile-options.ts	(129, 5)	TS2322	Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/sys/typescript/typescript-resolve-module.ts	(31, 35)	TS2454	Variable 'compilerExe' is used before being assigned.
src/compiler/sys/typescript/typescript-resolve-module.ts	(53, 75)	TS2345	Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'.
src/compiler/sys/typescript/typescript-resolve-module.ts	(81, 24)	TS18048	'config.sys' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-resolve-module.ts	(88, 5)	TS18048	'config.logger' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-resolve-module.ts	(121, 50)	TS18048	'config.sys' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-resolve-module.ts	(123, 7)	TS2322	Type 'null' is not assignable to type 'ResolvedModuleWithFailedLookupLocations'.
src/compiler/sys/typescript/typescript-resolve-module.ts	(161, 11)	TS18048	'config.sys' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-resolve-module.ts	(162, 13)	TS2322	Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/sys/typescript/typescript-resolve-module.ts	(190, 11)	TS2322	Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/sys/typescript/typescript-resolve-module.ts	(198, 3)	TS2322	Type 'null' is not assignable to type 'ResolvedModuleWithFailedLookupLocations'.
src/compiler/sys/typescript/typescript-sys.ts	(115, 9)	TS2322	Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/sys/typescript/typescript-sys.ts	(120, 9)	TS18048	'config.logger' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts	(134, 21)	TS2722	Cannot invoke an object which is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts	(134, 21)	TS18048	'compilerSystem.watchDirectory' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts	(149, 21)	TS2722	Cannot invoke an object which is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts	(149, 21)	TS18048	'compilerSystem.watchFile' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts	(210, 24)	TS18048	'config.sys' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts	(211, 7)	TS2322	Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/sys/typescript/typescript-sys.ts	(227, 5)	TS18048	'results' is possibly 'undefined'.
src/compiler/sys/typescript/typescript-sys.ts	(227, 25)	TS18048	'results' is possibly 'undefined'.
src/compiler/transformers/test/transpile.ts	(67, 64)	TS2345	Argument of type 'ScriptTarget | undefined' is not assignable to parameter of type 'ScriptTarget | CreateSourceFileOptions'.
src/compiler/transformers/test/transpile.ts	(75, 20)	TS2345	Argument of type 'Config | null | undefined' is not assignable to parameter of type 'Config'. Type 'undefined' is not assignable to type 'Config'.
src/compiler/transformers/test/transpile.ts	(75, 51)	TS18048	'tsSourceFiles' is possibly 'undefined'.
src/compiler/transformers/test/transpile.ts	(114, 73)	TS2345	Argument of type 'null' is not assignable to parameter of type 'CollectionCompilerMeta'.
src/compiler/transformers/test/transpile.ts	(146, 5)	TS2454	Variable 'declarationOutputText' is used before being assigned.
src/compiler/transformers/test/transpile.ts	(158, 5)	TS2454	Variable 'outputText' is used before being assigned.
src/compiler/transpile/run-program.ts	(43, 51)	TS18048	'tsSourceFiles' is possibly 'undefined'.
src/compiler/transpile/run-program.ts	(43, 104)	TS2345	Argument of type 'null' is not assignable to parameter of type 'CollectionCompilerMeta'.
src/compiler/transpile/run-program.ts	(45, 40)	TS18048	'tsSourceFiles' is possibly 'undefined'.
src/compiler/transpile/run-program.ts	(63, 5)	TS18048	'transformers.before' is possibly 'undefined'.
src/compiler/transpile/run-program.ts	(76, 5)	TS18048	'transformers.afterDeclarations' is possibly 'undefined'.
src/compiler/transpile/run-program.ts	(113, 47)	TS2345	Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/transpile/transpile-module.ts	(52, 5)	TS2322	Type 'null' is not assignable to type 'string'.
src/compiler/transpile/transpile-module.ts	(55, 5)	TS2322	Type 'null' is not assignable to type 'Module'.
src/compiler/transpile/transpile-module.ts	(83, 65)	TS2345	Argument of type 'ScriptTarget | undefined' is not assignable to parameter of type 'ScriptTarget | CreateSourceFileOptions'. Type 'undefined' is not assignable to type 'ScriptTarget | CreateSourceFileOptions'.
src/compiler/transpile/transpile-module.ts	(88, 56)	TS2345	Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/transpile/transpile-module.ts	(102, 73)	TS2345	Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.
src/compiler/transpile/transpile-module.ts	(116, 77)	TS2345	Argument of type 'null' is not assignable to parameter of type 'CollectionCompilerMeta'.
src/compiler/transpile/transpile-module.ts	(121, 5)	TS18048	'transformers.before' is possibly 'undefined'.
src/compiler/transpile/transpile-module.ts	(134, 5)	TS18048	'transformers.afterDeclarations' is possibly 'undefined'.
src/compiler/transpile/transpile-module.ts	(138, 5)	TS18048	'transformers.after' is possibly 'undefined'.
src/compiler/transpile/transpile-module.ts	(140, 5)	TS18048	'transformers.after' is possibly 'undefined'.
src/compiler/transpile/transpile-module.ts	(148, 24)	TS2345	Argument of type 'Diagnostic' is not assignable to parameter of type 'DiagnosticWithLocation'. Types of property 'file' are incompatible. Type 'SourceFile | undefined' is not assignable to type 'SourceFile'. Type 'undefined' is not assignable to type 'SourceFile'.
src/compiler/transpile/transpile-module.ts	(155, 3)	TS2322	Type 'Module | undefined' is not assignable to type 'Module'. Type 'undefined' is not assignable to type 'Module'.
src/compiler/transpile/transpile-module.ts	(162, 41)	TS2538	Type 'undefined' cannot be used as an index type.
src/compiler/transpile/transpile-module.ts	(163, 37)	TS2538	Type 'undefined' cannot be used as an index type.
src/testing/mocks.ts	(71, 5)	TS2322	Type 'null' is not assignable to type 'ConfigBundle[] | undefined'.
src/testing/mocks.ts	(76, 5)	TS2322	Type 'null' is not assignable to type 'string | undefined'.
src/testing/mocks.ts	(86, 5)	TS2322	Type 'null' is not assignable to type 'OutputTarget[] | undefined'.
src/testing/mocks.ts	(94, 5)	TS2322	Type 'null' is not assignable to type 'TestingConfig | undefined'.
src/testing/mocks.ts	(136, 5)	TS2322	Type 'null' is not assignable to type 'string'.
src/testing/mocks.ts	(141, 5)	TS2322	Type 'null' is not assignable to type 'Cache'.
src/testing/mocks.ts	(144, 5)	TS2322	Type 'null' is not assignable to type '{ access: (filePath: string) => Promise; accessSync: (filePath: string) => boolean; cancelDeleteDirectoriesFromDisk: (dirPaths: string[]) => void; cancelDeleteFilesFromDisk: (filePaths: string[]) => void; ... 17 more ...; writeFiles: (files: { ...; } | Map<...>, opts?: FsWriteOptions | undefined) => Promise...'.
src/testing/mocks.ts	(147, 5)	TS2322	Type 'null' is not assignable to type 'CompilerBuildResults'.
src/testing/mocks.ts	(157, 33)	TS2345	Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'.
src/testing/mocks.ts	(163, 37)	TS18048	'config' is possibly 'undefined'.
src/testing/mocks.ts	(163, 37)	TS2345	Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'.
src/testing/mocks.ts	(224, 30)	TS2322	Type 'null' is not assignable to type 'string'.
src/testing/mocks.ts	(229, 28)	TS2322	Type 'null' is not assignable to type 'string'.

reports and statistics

Our most error-prone files

Path	Error Count
src/compiler/config/test/validate-dev-server.spec.ts	49
src/compiler/config/test/validate-output-www.spec.ts	40
src/screenshot/connector-base.ts	40
src/dev-server/index.ts	38
src/mock-doc/serialize-node.ts	36
src/compiler/sys/tests/in-memory-fs.spec.ts	34
src/screenshot/screenshot-compare.ts	33
src/compiler/transformers/test/parse-props.spec.ts	32
src/dev-server/server-process.ts	32
src/runtime/vdom/vdom-render.ts	31
src/compiler/sys/typescript/typescript-config.ts	28
src/compiler/build/build-stats.ts	27
src/compiler/output-targets/dist-lazy/generate-lazy-module.ts	26
src/compiler/prerender/prerender-main.ts	25
src/sys/node/test/worker-manager.spec.ts	24
src/compiler/style/test/optimize-css.spec.ts	23
src/runtime/update-component.ts	23
src/testing/puppeteer/puppeteer-element.ts	23
src/compiler/config/test/validate-paths.spec.ts	22
src/utils/test/message-utils.spec.ts	21

Our most common errors

Typescript Error Code	Count	Error messages
TS2345	595	Error messages Argument of type 'CompilerSystem | undefined' is not assignable to parameter of type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'. Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'. Argument of type 'Promise<(() => void) | null>' is not assignable to parameter of type 'Promise<() => void>'. Argument of type 'null' is not assignable to parameter of type 'BuildResultsComponentGraph'. Argument of type 'DevServerConfig | undefined' is not assignable to parameter of type 'StencilDevServerConfig'. Type 'undefined' is not assignable to type 'StencilDevServerConfig'. Argument of type 'Promise<(() => void) | null>' is not assignable to parameter of type 'Promise<() => void>'. Type '(() => void) | null' is not assignable to type '() => void'. Type 'null' is not assignable to type '() => void'. Argument of type 'ComponentRuntimeHostListener[] | undefined' is not assignable to parameter of type 'ComponentRuntimeHostListener[]'. Type 'undefined' is not assignable to type 'ComponentRuntimeHostListener[]'. Argument of type 'HTMLScriptElement | null | undefined' is not assignable to parameter of type 'HTMLScriptElement'. Type 'undefined' is not assignable to type 'HTMLScriptElement'. Argument of type 'string | null' is not assignable to parameter of type 'string'. Type 'null' is not assignable to type 'string'. Argument of type 'Logger | undefined' is not assignable to parameter of type 'Logger'. Type 'undefined' is not assignable to type 'Logger'. Argument of type 'string[] | undefined' is not assignable to parameter of type 'string[]'. Type 'undefined' is not assignable to type 'string[]'. Argument of type 'string' is not assignable to parameter of type 'never'. Argument of type 'Diagnostic[] | undefined' is not assignable to parameter of type 'readonly Diagnostic[]'. Type 'undefined' is not assignable to type 'readonly Diagnostic[]'. Argument of type 'boolean | undefined' is not assignable to parameter of type 'boolean'. Argument of type 'BuildConditionals | undefined' is not assignable to parameter of type 'BuildConditionals'. Type 'undefined' is not assignable to type 'BuildConditionals'. Argument of type 'Diagnostic[] | undefined' is not assignable to parameter of type 'Diagnostic[]'. Type 'undefined' is not assignable to type 'Diagnostic[]'. Argument of type '{ styleText: string; output: string; map: null; diagnostics: never[]; imports: never[]; defaultVarName: string; styleDocs: never[]; }' is not assignable to parameter of type 'never'. Argument of type 'WorkerMeta | undefined' is not assignable to parameter of type 'WorkerMeta'. Type 'undefined' is not assignable to type 'WorkerMeta'. Argument of type 'string | null | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'. Argument of type 'Set<string | null>' is not assignable to parameter of type 'Set'. Type 'string | null' is not assignable to type 'string'. Type 'null' is not assignable to type 'string'. Argument of type 'Set<string | null>' is not assignable to parameter of type 'Set'. Argument of type 'RollupConfig | undefined' is not assignable to parameter of type 'RollupConfig'. Type 'undefined' is not assignable to type 'RollupConfig'. Argument of type '(string[] | undefined)[]' is not assignable to parameter of type 'string[][]'. Type 'string[] | undefined' is not assignable to type 'string[]'. Type 'undefined' is not assignable to type 'string[]'. Argument of type 'ComponentCompilerMeta | undefined' is not assignable to parameter of type 'ComponentCompilerMeta'. Type 'undefined' is not assignable to type 'ComponentCompilerMeta'. Argument of type 'true | Object | undefined' is not assignable to parameter of type 'boolean | Object | null'. Type 'undefined' is not assignable to type 'boolean | Object | null'. Argument of type 'SourceTarget | undefined' is not assignable to parameter of type 'SourceTarget'. Type 'undefined' is not assignable to type 'SourceTarget'. Argument of type 'boolean | undefined' is not assignable to parameter of type 'boolean'. Type 'undefined' is not assignable to type 'boolean'. Argument of type '(string | undefined)[]' is not assignable to parameter of type 'string[]'. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Argument of type '(string | undefined)[]' is not assignable to parameter of type 'string[]'. Argument of type 'RollupSourceMap | undefined' is not assignable to parameter of type 'SourceMap'. Type 'undefined' is not assignable to type 'SourceMap'. Argument of type 'EntryModule | undefined' is not assignable to parameter of type 'EntryModule'. Type 'undefined' is not assignable to type 'EntryModule'. Argument of type '(Module | undefined)[]' is not assignable to parameter of type 'Module[]'. Type 'Module | undefined' is not assignable to type 'Module'. Type 'undefined' is not assignable to type 'Module'. Argument of type 'Document | null' is not assignable to parameter of type 'Document'. Type 'null' is not assignable to type 'Document'. Argument of type 'Document | null' is not assignable to parameter of type 'Node | MockNode'. Type 'null' is not assignable to type 'Node | MockNode'. Argument of type 'HydrateAnchorElement' is not assignable to parameter of type '{ [attrName: string]: string; }'. 'string' index signatures are incompatible. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Argument of type 'URL | null' is not assignable to parameter of type 'URL'. Type 'null' is not assignable to type 'URL'. Argument of type 'number | undefined' is not assignable to parameter of type 'number'. Type 'undefined' is not assignable to type 'number'. Argument of type 'SitemapXmpResults | null' is not assignable to parameter of type 'SitemapXmpResults'. Type 'null' is not assignable to type 'SitemapXmpResults'. Argument of type 'string | undefined' is not assignable to parameter of type 'string | URL'. Argument of type 'Map<string, string[]> | undefined' is not assignable to parameter of type 'Map<string, string[]>'. Type 'undefined' is not assignable to type 'Map<string, string[]>'. Argument of type 'undefined' is not assignable to parameter of type 'string'. Argument of type 'ServiceWorkerConfig | undefined' is not assignable to parameter of type 'ServiceWorkerConfig'. Type 'undefined' is not assignable to type 'ServiceWorkerConfig'. Argument of type 'string | undefined' is not assignable to parameter of type 'string | URL'. Type 'undefined' is not assignable to type 'string | URL'. Argument of type 'CssNode[] | null | undefined' is not assignable to parameter of type 'void | CssNode[]'. Argument of type 'CssNode[] | null | undefined' is not assignable to parameter of type 'void | CssNode[]'. Type 'null' is not assignable to type 'void | CssNode[]'. Argument of type 'null' is not assignable to parameter of type 'string'. Argument of type 'CompilerSystemCreateDirectoryOptions | undefined' is not assignable to parameter of type 'CompilerSystemCreateDirectoryOptions'. Type 'undefined' is not assignable to type 'CompilerSystemCreateDirectoryOptions'. Argument of type 'null' is not assignable to parameter of type 'CompilerFileWatcherEvent'. Argument of type 'null' is not assignable to parameter of type '{ access: (filePath: string) => Promise; accessSync: (filePath: string) => boolean; cancelDeleteDirectoriesFromDisk: (dirPaths: string[]) => void; cancelDeleteFilesFromDisk: (filePaths: string[]) => void; ... 17 more ...; writeFiles: (files: { ...; } | Map<...>, opts?: FsWriteOptions | undefined) => Promise...'. Argument of type 'undefined' is not assignable to parameter of type 'TypeChecker'. Argument of type 'CollectionBundleManifest[] | undefined' is not assignable to parameter of type 'any[]'. Type 'undefined' is not assignable to type 'any[]'. Argument of type 'Module | undefined' is not assignable to parameter of type 'Module'. Type 'undefined' is not assignable to type 'Module'. Argument of type 'NodeArray | undefined' is not assignable to parameter of type 'NodeArray | HeritageClause[]'. Type 'undefined' is not assignable to type 'NodeArray | HeritageClause[]'. Argument of type 'Block | undefined' is not assignable to parameter of type 'Block'. Type 'undefined' is not assignable to type 'Block'. Argument of type 'Expression | undefined' is not assignable to parameter of type 'Expression'. Type 'undefined' is not assignable to type 'Expression'. Argument of type 'Symbol | undefined' is not assignable to parameter of type 'Symbol'. Type 'undefined' is not assignable to type 'Symbol'. Argument of type 'TypeNode | undefined' is not assignable to parameter of type 'Node'. Type 'undefined' is not assignable to type 'Node'. Argument of type '(PropertyAssignment | null)[]' is not assignable to parameter of type 'readonly ObjectLiteralElementLike[]'. Type 'PropertyAssignment | null' is not assignable to type 'ObjectLiteralElementLike'. Type 'null' is not assignable to type 'ObjectLiteralElementLike'. Argument of type 'Signature | undefined' is not assignable to parameter of type 'Signature'. Type 'undefined' is not assignable to type 'Signature'. Argument of type 'Identifier | undefined' is not assignable to parameter of type 'Node'. Type 'undefined' is not assignable to type 'Node'. Argument of type 'ScriptTarget | undefined' is not assignable to parameter of type 'ScriptTarget | CreateSourceFileOptions'. Argument of type 'Config | null | undefined' is not assignable to parameter of type 'Config'. Type 'undefined' is not assignable to type 'Config'. Argument of type 'null' is not assignable to parameter of type 'CollectionCompilerMeta'. Argument of type 'PropertyName | undefined' is not assignable to parameter of type 'PropertyName'. Type 'undefined' is not assignable to type 'PropertyName'. Argument of type 'NamedExportBindings | undefined' is not assignable to parameter of type 'Node'. Type 'undefined' is not assignable to type 'Node'. Argument of type 'Declaration | undefined' is not assignable to parameter of type 'Node'. Type 'undefined' is not assignable to type 'Node'. Argument of type 'Identifier | undefined' is not assignable to parameter of type 'string | BindingName'. Type 'undefined' is not assignable to type 'string | BindingName'. Argument of type 'ScriptTarget | undefined' is not assignable to parameter of type 'ScriptTarget | CreateSourceFileOptions'. Type 'undefined' is not assignable to type 'ScriptTarget | CreateSourceFileOptions'. Argument of type 'Diagnostic' is not assignable to parameter of type 'DiagnosticWithLocation'. Types of property 'file' are incompatible. Type 'SourceFile | undefined' is not assignable to type 'SourceFile'. Type 'undefined' is not assignable to type 'SourceFile'. Argument of type '(...pathSegments: string[]) => string | undefined' is not assignable to parameter of type '(...args: string[]) => string'. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Argument of type 'OpenInEditorCallback | undefined' is not assignable to parameter of type 'OpenInEditorCallback'. Type 'undefined' is not assignable to type 'OpenInEditorCallback'. Argument of type 'CompilerWatcher | undefined' is not assignable to parameter of type 'CompilerWatcher'. Type 'undefined' is not assignable to type 'CompilerWatcher'. Argument of type '{ editor: string | undefined; }' is not assignable to parameter of type 'OpenInEditorOptions'. Types of property 'editor' are incompatible. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Argument of type 'string | undefined' is not assignable to parameter of type 'PathLike'. Argument of type 'DevServerConfig | undefined' is not assignable to parameter of type 'DevServerConfig'. Type 'undefined' is not assignable to type 'DevServerConfig'. Argument of type 'CompilerBuildResults | undefined' is not assignable to parameter of type 'CompilerBuildResults'. Type 'undefined' is not assignable to type 'CompilerBuildResults'. Argument of type 'Window | undefined' is not assignable to parameter of type 'Window'. Type 'undefined' is not assignable to type 'Window'. Argument of type 'SerializeDocumentOptions | undefined' is not assignable to parameter of type 'HydrateDocumentOptions'. Type 'undefined' is not assignable to type 'HydrateDocumentOptions'. Argument of type 'HydrateDocumentOptions | undefined' is not assignable to parameter of type 'HydrateDocumentOptions'. Type 'undefined' is not assignable to type 'HydrateDocumentOptions'. Argument of type 'MockNode | null' is not assignable to parameter of type 'MockNode'. Type 'null' is not assignable to type 'MockNode'. Argument of type 'string | undefined' is not assignable to parameter of type 'string | null'. Type 'undefined' is not assignable to type 'string | null'. Argument of type 'string | undefined' is not assignable to parameter of type 'string | null'. Argument of type 'ShadowRoot | null' is not assignable to parameter of type 'Node'. Type 'null' is not assignable to type 'Node'. Argument of type 'MockElement' is not assignable to parameter of type 'MockHTMLElement'. Types of property 'namespaceURI' are incompatible. Type 'string | null' is not assignable to type 'string'. Type 'null' is not assignable to type 'string'. Argument of type 'null' is not assignable to parameter of type 'string | Node'. Argument of type 'null' is not assignable to parameter of type 'string | boolean | undefined'. Argument of type '(Window & typeof globalThis) | null' is not assignable to parameter of type 'Window'. Type 'null' is not assignable to type 'Window'. Argument of type 'string | null | undefined' is not assignable to parameter of type 'string | undefined'. Argument of type 'HostRef | undefined' is not assignable to parameter of type 'HostRef'. Type 'undefined' is not assignable to type 'HostRef'. Argument of type 'this' is not assignable to parameter of type 'HostElement'. Type 'HostElement' is not assignable to type 'import("/home/runner/work/stencil/stencil/src/declarations/stencil-private").HostElement'. The types returned by 'componentOnReady()' are incompatible between these types. Type 'Promise | undefined' is not assignable to type 'Promise'. Type 'undefined' is not assignable to type 'Promise'. Argument of type 'this' is not assignable to parameter of type 'HostElement'. Argument of type 'string | null' is not assignable to parameter of type 'string | undefined'. Argument of type 'PropertyDescriptor | undefined' is not assignable to parameter of type 'PropertyDescriptor & ThisType'. Type 'undefined' is not assignable to type 'PropertyDescriptor & ThisType'. Type 'undefined' is not assignable to type 'PropertyDescriptor'. Argument of type 'HTMLElement | undefined' is not assignable to parameter of type 'HTMLElement'. Type 'undefined' is not assignable to type 'HTMLElement'. Argument of type 'HostElement | undefined' is not assignable to parameter of type 'HostElement'. Type 'undefined' is not assignable to type 'HostElement'. Argument of type 'HostElement | undefined' is not assignable to parameter of type 'EventTarget'. Type 'undefined' is not assignable to type 'EventTarget'. Argument of type 'HostElement | undefined' is not assignable to parameter of type 'Element'. Type 'undefined' is not assignable to type 'Element'. Argument of type 'VNode[] | undefined' is not assignable to parameter of type 'VNode[]'. Type 'undefined' is not assignable to type 'VNode[]'. Argument of type 'null | undefined' is not assignable to parameter of type 'ChildType'. Type 'undefined' is not assignable to type 'ChildType'. Argument of type 'VNode | null' is not assignable to parameter of type 'ChildType'. Type 'null' is not assignable to type 'ChildType'. Argument of type 'VNode | undefined' is not assignable to parameter of type 'ChildType'. Type 'undefined' is not assignable to type 'ChildType'. Argument of type 'VNode | null | undefined' is not assignable to parameter of type 'ChildType'. Type 'undefined' is not assignable to type 'ChildType'. Argument of type 'null | undefined' is not assignable to parameter of type 'ChildType'. Argument of type 'RenderNode | undefined' is not assignable to parameter of type 'Node | null'. Type 'undefined' is not assignable to type 'Node | null'. Argument of type 'VNode | undefined' is not assignable to parameter of type 'VNode'. Type 'undefined' is not assignable to type 'VNode'. Argument of type 'null' is not assignable to parameter of type 'VNode'. Argument of type 'RenderNode | undefined' is not assignable to parameter of type 'Node'. Type 'undefined' is not assignable to type 'Node'. Argument of type 'null' is not assignable to parameter of type 'RenderNode'. Argument of type 'ScreenshotDiff | undefined' is not assignable to parameter of type 'ScreenshotDiff'. Type 'undefined' is not assignable to type 'ScreenshotDiff'. Argument of type 'string | undefined' is not assignable to parameter of type 'PathLike'. Type 'undefined' is not assignable to type 'PathLike'. Argument of type 'string | undefined' is not assignable to parameter of type 'string | SemVer'. Type 'undefined' is not assignable to type 'string | SemVer'. Argument of type 'string | undefined' is not assignable to parameter of type 'string | SemVer'. Argument of type 'null' is not assignable to parameter of type 'number | undefined'. Argument of type 'null' is not assignable to parameter of type 'number | PromiseLike'. Argument of type 'CompilerWorkerTask | undefined' is not assignable to parameter of type 'CompilerWorkerTask'. Type 'undefined' is not assignable to type 'CompilerWorkerTask'. Argument of type 'null' is not assignable to parameter of type 'CompilerWorkerTask'. Argument of type 'undefined' is not assignable to parameter of type 'ErrorHandler'. Argument of type 'string | undefined' is not assignable to parameter of type 'MockRequestInfo'. Type 'undefined' is not assignable to type 'MockRequestInfo'. Argument of type 'string | undefined' is not assignable to parameter of type 'MockRequestInfo'. Argument of type 'MockResponse | undefined' is not assignable to parameter of type 'MockResponse'. Type 'undefined' is not assignable to type 'MockResponse'. Argument of type 'RuntimeRef | undefined' is not assignable to parameter of type 'RuntimeRef'. Type 'undefined' is not assignable to type 'RuntimeRef'. Argument of type 'this' is not assignable to parameter of type 'E2EElementInternal'. Type 'E2EElement' is not assignable to type 'E2EElementInternal'. Types of property 'find' are incompatible. Type '(selector: string) => Promise<E2EElement | null>' is not assignable to type '(selector: FindSelector) => Promise'. Argument of type '(elm: Element, pseudoElt: string) => any' is not assignable to parameter of type 'string | EvaluateFunc<[ElementHandle, string | null | undefined]>'. Type '(elm: Element, pseudoElt: string) => any' is not assignable to type 'EvaluateFunc<[ElementHandle, string | null | undefined]>'. Types of parameters 'pseudoElt' and 'params_1' are incompatible. Type 'string | null | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Argument of type 'this' is not assignable to parameter of type 'E2EElementInternal'. Argument of type '{ viewport: EmulateViewport | undefined; userAgent: string | undefined; }' is not assignable to parameter of type 'Device'. Types of property 'userAgent' are incompatible. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Argument of type 'null' is not assignable to parameter of type 'SourceMap | undefined'. Argument of type '{ tags: never[]; text: string; } | null | undefined' is not assignable to parameter of type 'CompilerJsDoc | undefined'. Type 'null' is not assignable to type 'CompilerJsDoc | undefined'.
TS18048	575	Error messages 'config.sys' is possibly 'undefined'. 'sys.details' is possibly 'undefined'. 'details' is possibly 'undefined'. 'config.devServer' is possibly 'undefined'. 'config.sys.getDevServerExecutingPath' is possibly 'undefined'. 'config.sys.lazyRequire' is possibly 'undefined'. 'sys.parseYarnLockFile' is possibly 'undefined'. 'scope.styleEl' is possibly 'undefined'. 'moduleFile' is possibly 'undefined'. 'config.extras' is possibly 'undefined'. 'config.logger' is possibly 'undefined'. 'hmr' is possibly 'undefined'. 'config.outputTargets' is possibly 'undefined'. 'c.moduleFiles' is possibly 'undefined'. 'a.name' is possibly 'undefined'. 'b.name' is possibly 'undefined'. 'orgNodeResolveId' is possibly 'undefined'. 'config.rollupPlugins' is possibly 'undefined'. 'config.rollupConfig' is possibly 'undefined'. 'config.rollupConfig.inputOptions' is possibly 'undefined'. 'compilerCtx.worker' is possibly 'undefined'. 'pluginTransforms.dependencies' is possibly 'undefined'. 'lastModified' is possibly 'undefined'. 'config.devServer.historyApiFallback' is possibly 'undefined'. 'inputConfig.devServer' is possibly 'undefined'. 'inputConfig.flags' is possibly 'undefined'. 'userConfig.flags' is possibly 'undefined'. 'www' is possibly 'undefined'. 'outputTarget' is possibly 'undefined'. 'o' is possibly 'undefined'. 'cmp' is possibly 'undefined'. 'deps' is possibly 'undefined'. 'cmp.directDependents' is possibly 'undefined'. 'cmp.dependents' is possibly 'undefined'. 'config.bundles' is possibly 'undefined'. 'c.dependencies' is possibly 'undefined'. 'c.directDependencies' is possibly 'undefined'. 'outputTargets' is possibly 'undefined'. 'opts' is possibly 'undefined'. 'errorLine.text' is possibly 'undefined'. 'errorLine.errorLength' is possibly 'undefined'. 'opts.format' is possibly 'undefined'. 'entryModule' is possibly 'undefined'. 'a.directDependents' is possibly 'undefined'. 'b.directDependents' is possibly 'undefined'. 'a.directDependencies' is possibly 'undefined'. 'b.directDependencies' is possibly 'undefined'. 'a.dependents' is possibly 'undefined'. 'b.dependents' is possibly 'undefined'. 'a.dependencies' is possibly 'undefined'. 'b.dependencies' is possibly 'undefined'. 'bundleOptions.loader' is possibly 'undefined'. 'pluginCtx.config.plugins' is possibly 'undefined'. 'transformResults.id' is possibly 'undefined'. 'transformResults.dependencies' is possibly 'undefined'. 'transformResults.diagnostics' is possibly 'undefined'. 'config.maxConcurrentWorkers' is possibly 'undefined'. 'hydrateOpts.staticComponents' is possibly 'undefined'. 'sys.generateFileHash' is possibly 'undefined'. 'manager.config.logger' is possibly 'undefined'. 'manager.config.sys' is possibly 'undefined'. 'serviceWorker' is possibly 'undefined'. 'node.comment' is possibly 'undefined'. 'node.selectors' is possibly 'undefined'. 'node.values' is possibly 'undefined'. 'moduleId' is possibly 'undefined'. 'sys' is possibly 'undefined'. 'tsResults.diagnostics' is possibly 'undefined'. 'r.resolvedModule' is possibly 'undefined'. 'results' is possibly 'undefined'. 'compilerSystem.watchDirectory' is possibly 'undefined'. 'compilerSystem.watchFile' is possibly 'undefined'. 'collectionManifest.bundles' is possibly 'undefined'. 'cstrMethod.body' is possibly 'undefined'. 'cmp.dependencies' is possibly 'undefined'. 'foundDep' is possibly 'undefined'. 'connectedCallback.body' is possibly 'undefined'. 'cmpNode.name' is possibly 'undefined'. 'symbol.declarations' is possibly 'undefined'. 'signature' is possibly 'undefined'. 'collection.moduleFiles' is possibly 'undefined'. 'tsSourceFiles' is possibly 'undefined'. 'results.data' is possibly 'undefined'. 'results.imports' is possibly 'undefined'. 'transformers.before' is possibly 'undefined'. 'transformers.afterDeclarations' is possibly 'undefined'. 'transformers.after' is possibly 'undefined'. 'msg.requestLog' is possibly 'undefined'. 'msg.error' is possibly 'undefined'. 'msg.buildResults' is possibly 'undefined'. 'a.priority' is possibly 'undefined'. 'b.priority' is possibly 'undefined'. 'devServerConfig.historyApiFallback' is possibly 'undefined'. 'devServerConfig.basePath' is possibly 'undefined'. 'req.pathname' is possibly 'undefined'. 'req.stats' is possibly 'undefined'. 'devServerConfig' is possibly 'undefined'. 'res.$content' is possibly 'undefined'. 'opts.maxHydrateCount' is possibly 'undefined'. 'ref' is possibly 'undefined'. 'opts.excludeComponents' is possibly 'undefined'. 'hostRef' is possibly 'undefined'. 'hostRef.$instanceValues$' is possibly 'undefined'. 'ref.$onInstancePromise$' is possibly 'undefined'. 'ref.$lazyInstance$' is possibly 'undefined'. 'opts.indentSpaces' is possibly 'undefined'. 'opts.approximateLineWidth' is possibly 'undefined'. 'plt.$orgLocNodes$' is possibly 'undefined'. 'hostRef.$lazyInstance$' is possibly 'undefined'. 'cmpMeta.$attrsToReflect$' is possibly 'undefined'. 'cmpMeta.$members$' is possibly 'undefined'. 'elm' is possibly 'undefined'. 'hostRef.$renderCount$' is possibly 'undefined'. 'childrenPromises' is possibly 'undefined'. 'hostRef.$hostElement$' is possibly 'undefined'. 'nodeRef' is possibly 'undefined'. 'hostElm' is possibly 'undefined'. 'screenshot.diff' is possibly 'undefined'. 'screenshotCache.items' is possibly 'undefined'. 'a.width' is possibly 'undefined'. 'b.width' is possibly 'undefined'. 'a.height' is possibly 'undefined'. 'b.height' is possibly 'undefined'. 'a.id' is possibly 'undefined'. 'b.id' is possibly 'undefined'. 'emulateConfig.viewport' is possibly 'undefined'. 'emulateConfig.viewport.deviceScaleFactor' is possibly 'undefined'. 'res.statusCode' is possibly 'undefined'. 'tsSysWatchDirectory' is possibly 'undefined'. 'tsSysWatchFile' is possibly 'undefined'. 'sys.events' is possibly 'undefined'. 't.retries' is possibly 'undefined'. 'testing.emulate' is possibly 'undefined'. 'parsedConfig.collectCoverageFrom' is possibly 'undefined'. 'compare.width' is possibly 'undefined'. 'compare.deviceScaleFactor' is possibly 'undefined'. 'compare.height' is possibly 'undefined'. 'config' is possibly 'undefined'. 'screenshotEmulate.viewport' is possibly 'undefined'. 'd.absFilePath' is possibly 'undefined'. 'd.code' is possibly 'undefined'.
TS2322	506	Error messages Type 'string | null | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Type 'null' is not assignable to type 'DevServerConfig | undefined'. Type 'boolean | null | undefined' is not assignable to type 'boolean | undefined'. Type 'null' is not assignable to type 'boolean | undefined'. Type 'null' is not assignable to type 'DevServer'. Type 'undefined' is not assignable to type 'ComponentConstructor | Promise'. Type 'HTMLElement | null' is not assignable to type 'HTMLElement'. Type 'null' is not assignable to type 'HTMLElement'. Type '({ type: "chunk"; fileName: string; map: SourceMap | undefined; code: string; moduleFormat: ModuleFormat | undefined; entryKey: string; imports: string[]; isEntry: boolean; ... 4 more ...; content?: undefined; } | { ...; })[]' is not assignable to type 'RollupResult[]'. Type '{ type: "chunk"; fileName: string; map: SourceMap | undefined; code: string; moduleFormat: ModuleFormat | undefined; entryKey: string; imports: string[]; isEntry: boolean; ... 4 more ...; content?: undefined; } | { ...; }' is not assignable to type 'RollupResult'. Type '{ type: "chunk"; fileName: string; map: SourceMap | undefined; code: string; moduleFormat: ModuleFormat | undefined; entryKey: string; imports: string[]; isEntry: boolean; ... 4 more ...; content?: undefined; }' is not assignable to type 'RollupResult'. Type '{ type: "chunk"; fileName: string; map: SourceMap | undefined; code: string; moduleFormat: ModuleFormat | undefined; entryKey: string; imports: string[]; isEntry: boolean; ... 4 more ...; content?: undefined; }' is not assignable to type 'RollupChunkResult'. Types of property 'moduleFormat' are incompatible. Type 'ModuleFormat | undefined' is not assignable to type 'ModuleFormat'. Type 'undefined' is not assignable to type 'ModuleFormat'. Type 'null' is not assignable to type 'CompilerBuildResults'. Type 'undefined' is not assignable to type 'string'. Type 'null' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'Document'. Type 'null' is not assignable to type 'Promise'. Type 'null' is not assignable to type 'LoggerTimeSpan'. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Type 'boolean | undefined' is not assignable to type 'boolean'. Type 'number | undefined' is not assignable to type 'number'. Type 'undefined' is not assignable to type 'number'. Type 'boolean | "prod" | undefined' is not assignable to type 'boolean | "prod"'. Type 'undefined' is not assignable to type 'boolean | "prod"'. Type 'BuildResultsComponentGraph | undefined' is not assignable to type 'BuildResultsComponentGraph'. Type 'undefined' is not assignable to type 'BuildResultsComponentGraph'. Type 'RollupResults | undefined' is not assignable to type 'RollupResults'. Type 'undefined' is not assignable to type 'RollupResults'. Type '{ name: string | undefined; source: string; tags: any[]; }[]' is not assignable to type '{ name: string; source: string; tags: string[]; }[]'. Type '{ name: string | undefined; source: string; tags: any[]; }' is not assignable to type '{ name: string; source: string; tags: string[]; }'. Types of property 'name' are incompatible. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Type 'null' is not assignable to type 'CompilerWorkerContext'. Type 'null' is not assignable to type 'WatchOfConfigFile'. Type 'null' is not assignable to type 'Promise<(void | void[])[]>'. Type 'Promise<(void | void[] | null)[]>' is not assignable to type 'Promise<(void | void[])[]>'. Type '(void | void[] | null)[]' is not assignable to type '(void | void[])[]'. Type 'void | void[] | null' is not assignable to type 'void | void[]'. Type 'null' is not assignable to type 'void | void[]'. Type 'null' is not assignable to type '{ program: WatchOfConfigFile; rebuild: () => void; }'. Type '(this: PluginContext, importee: string, importer: string) => Promise' is not assignable to type 'ResolveIdHook'. Types of parameters 'importer' and 'importer' are incompatible. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Type '(this: PluginContext, importee: string, importer: string) => Promise' is not assignable to type 'ResolveIdHook'. Types of parameters 'importer' and 'importer' are incompatible. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Type 'string | null' is not assignable to type 'string'. Type 'null' is not assignable to type 'string'. Type 'null' is not assignable to type 'string | undefined'. Type '{ code: string; exports: string[]; workerMsgId: string; dependencies: string[]; } | null' is not assignable to type 'WorkerMeta | undefined'. Type 'null' is not assignable to type 'WorkerMeta | undefined'. Type 'WorkerMeta | undefined' is not assignable to type 'WorkerMeta'. Type 'undefined' is not assignable to type 'WorkerMeta'. Type 'CompilerSystem | undefined' is not assignable to type 'CompilerSystem'. Type 'undefined' is not assignable to type 'CompilerSystem'. Type 'Logger | undefined' is not assignable to type 'Logger'. Type 'undefined' is not assignable to type 'Logger'. Type 'import("/home/runner/work/stencil/stencil/src/compiler/cache").Cache' is not assignable to type 'import("/home/runner/work/stencil/stencil/src/declarations/stencil-private").Cache'. The types returned by 'get(...)' are incompatible between these types. Type 'Promise<string | null>' is not assignable to type 'Promise'. Type 'null' is not assignable to type 'ValidatedConfig'. Type 'null' is not assignable to type 'Config'. Type 'null' is not assignable to type 'string[]'. Type '{ dir: string; buildDir: string; collectionDir: string | null; typesDir: string; esmLoaderPath: string; copy: d.CopyTask[]; polyfills: boolean | undefined; empty: boolean; transformAliasedImportPathsInCollection: boolean; type: "dist"; }' is not assignable to type 'Required'. Types of property 'polyfills' are incompatible. Type 'boolean | undefined' is not assignable to type 'boolean'. Type 'null' is not assignable to type 'number | undefined'. Type 'null' is not assignable to type 'HistoryApiFallback | undefined'. Type 'null' is not assignable to type 'CopyTask[] | undefined'. Type '{ dirPath: string; filePath: string; fileName: string; readmePath: string; usagesDir: string; tag: string; readme: string | undefined; overview: string; usage: JsonDocsUsage; ... 13 more ...; listeners: JsonDocsListener[]; }[]' is not assignable to type 'JsonDocsComponent[]'. Type '{ dirPath: string; filePath: string; fileName: string; readmePath: string; usagesDir: string; tag: string; readme: string | undefined; overview: string; usage: d.JsonDocsUsage; docs: string; ... 12 more ...; listeners: d.JsonDocsListener[]; }' is not assignable to type 'JsonDocsComponent'. Types of property 'readme' are incompatible. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Type 'string[] | undefined' is not assignable to type 'string[]'. Type 'undefined' is not assignable to type 'string[]'. Type '{ name: string; type: string; mutable: boolean; attr: string | undefined; reflectToAttr: boolean; docs: string; docsTags: CompilerJsDocTagInfo[]; default: string | undefined; deprecation: string | undefined; values: JsonDocsValue[]; optional: boolean; required: boolean; }[]' is not assignable to type 'JsonDocsProp[]'. Type '{ name: string; type: string; mutable: boolean; attr: string | undefined; reflectToAttr: boolean; docs: string; docsTags: d.CompilerJsDocTagInfo[]; default: string | undefined; deprecation: string | undefined; values: d.JsonDocsValue[]; optional: boolean; required: boolean; }' is not assignable to type 'JsonDocsProp'. Types of property 'default' are incompatible. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Type '{ name: string; type: string; mutable: false; attr: string; reflectToAttr: false; docs: string; docsTags: never[]; default: undefined; deprecation: undefined; values: JsonDocsValue[]; optional: true; required: false; }[]' is not assignable to type 'JsonDocsProp[]'. Type '{ name: string; type: string; mutable: false; attr: string; reflectToAttr: false; docs: string; docsTags: never[]; default: undefined; deprecation: undefined; values: d.JsonDocsValue[]; optional: true; required: false; }' is not assignable to type 'JsonDocsProp'. Types of property 'default' are incompatible. Type 'undefined' is not assignable to type 'string'. Type '(ComponentCompilerMeta | undefined)[]' is not assignable to type 'ComponentCompilerMeta[]'. Type 'ComponentCompilerMeta | undefined' is not assignable to type 'ComponentCompilerMeta'. Type 'undefined' is not assignable to type 'ComponentCompilerMeta'. Type '(ComponentCompilerMeta | undefined)[][]' is not assignable to type 'readonly ComponentCompilerMeta[][]'. Type '(ComponentCompilerMeta | undefined)[]' is not assignable to type 'ComponentCompilerMeta[]'. Type 'null' is not assignable to type 'boolean | SourceMapOptions | undefined'. Type 'null' is not assignable to type 'SourceMap | undefined'. Type '{ name: string | undefined; tags: string[]; }[]' is not assignable to type 'CollectionDependencyData[]'. Type '{ name: string | undefined; tags: string[]; }' is not assignable to type 'CollectionDependencyData'. Types of property 'name' are incompatible. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Type 'string | undefined' is not assignable to type 'string | number'. Type 'undefined' is not assignable to type 'string | number'. Type 'SourceMap | undefined' is not assignable to type 'SourceMap'. Type 'undefined' is not assignable to type 'SourceMap'. Type 'string | null' is not assignable to type 'string | undefined'. Type 'null' is not assignable to type 'string | undefined'. Type 'null' is not assignable to type 'Function'. Type 'null' is not assignable to type 'Map<string, string[]>'. Type 'null' is not assignable to type 'PrerenderConfig'. Type 'null' is not assignable to type 'Set'. Type 'null' is not assignable to type 'HydrateAnchorElement[]'. Type 'null' is not assignable to type '(prerenderRequest: PrerenderUrlRequest) => Promise'. Type 'CssNode | null' is not assignable to type 'void | CssNode'. Type 'null' is not assignable to type 'void | CssNode'. Type 'CssNode | null' is not assignable to type 'CssNode'. Type 'null' is not assignable to type 'CssNode'. Type 'CssNode | null' is not assignable to type 'void | CssNode'. Type 'RegExpExecArray | null' is not assignable to type 'RegExpExecArray'. Type 'null' is not assignable to type 'RegExpExecArray'. Type 'null' is not assignable to type '() => string'. Type 'null' is not assignable to type 'number'. Type 'null' is not assignable to type 'boolean'. Type 'null' is not assignable to type 'boolean | undefined'. Type 'FsItem | undefined' is not assignable to type 'FsItem'. Type 'undefined' is not assignable to type 'FsItem'. Type 'null' is not assignable to type 'CompilerFileWatcherCallback[]'. Type '(key: string) => string | undefined' is not assignable to type '(key: string) => string'. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Type '(p: string) => Promise<string | undefined>' is not assignable to type '{ (p: string): Promise; (p: string, encoding: "utf8"): Promise; (p: string, encoding: "binary"): Promise; }'. Type 'Promise<string | undefined>' is not assignable to type 'Promise'. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Type '(p: string) => string | undefined' is not assignable to type '(p: string, encoding?: string | undefined) => string'. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Type '((maxConcurrentWorkers: number) => WorkerMainController) | null' is not assignable to type '((maxConcurrentWorkers: number) => WorkerMainController) | undefined'. Type 'null' is not assignable to type '((maxConcurrentWorkers: number) => WorkerMainController) | undefined'. Type 'null' is not assignable to type 'ResolvedModuleWithFailedLookupLocations'. Type 'null' is not assignable to type 'Worker'. Type 'CollectionCompilerMeta | undefined' is not assignable to type 'CollectionCompilerMeta'. Type 'undefined' is not assignable to type 'CollectionCompilerMeta'. Type 'DeclarationName | undefined' is not assignable to type 'DeclarationName'. Type 'undefined' is not assignable to type 'DeclarationName'. Type 'boolean | null' is not assignable to type 'boolean'. Type 'null' is not assignable to type 'boolean'. Type 'undefined' is not assignable to type 'ComponentCompilerVirtualProperty'. Type '{ name: string; method: string; bubbles: boolean; cancelable: boolean; composed: boolean; docs: CompilerJsDoc; complexType: ComponentCompilerEventComplexType; internal: boolean | undefined; }[]' is not assignable to type 'ComponentCompilerEvent[]'. Type '{ name: string; method: string; bubbles: boolean; cancelable: boolean; composed: boolean; docs: d.CompilerJsDoc; complexType: d.ComponentCompilerEventComplexType; internal: boolean | undefined; }' is not assignable to type 'ComponentCompilerEvent'. Types of property 'internal' are incompatible. Type 'boolean | undefined' is not assignable to type 'boolean'. Type '{ name: string; docs: CompilerJsDoc; complexType: ComponentCompilerMethodComplexType; internal: boolean | undefined; }[]' is not assignable to type 'ComponentCompilerMethod[]'. Type '{ name: string; docs: d.CompilerJsDoc; complexType: d.ComponentCompilerMethodComplexType; internal: boolean | undefined; }' is not assignable to type 'ComponentCompilerMethod'. Types of property 'internal' are incompatible. Type 'boolean | undefined' is not assignable to type 'boolean'. Type '{ name: string; type: ComponentCompilerPropertyType; attribute: string | undefined; reflect: boolean; mutable: boolean; required: boolean; optional: boolean; defaultValue: string | undefined; complexType: ComponentCompilerPropertyComplexType; docs: CompilerJsDoc; internal: boolean | undefined; }[]' is not assignable to type 'ComponentCompilerProperty[]'. Type '{ name: string; type: d.ComponentCompilerPropertyType; attribute: string | undefined; reflect: boolean; mutable: boolean; required: boolean; optional: boolean; defaultValue: string | undefined; complexType: d.ComponentCompilerPropertyComplexType; docs: d.CompilerJsDoc; internal: boolean | undefined; }' is not assignable to type 'ComponentCompilerProperty'. Types of property 'internal' are incompatible. Type 'boolean | undefined' is not assignable to type 'boolean'. Type 'null' is not assignable to type 'ImportData'. Type 'undefined' is not assignable to type '"queryparams" | null'. Type 'null' is not assignable to type 'WeakSet'. Type 'null' is not assignable to type 'Module'. Type 'Module | undefined' is not assignable to type 'Module'. Type 'undefined' is not assignable to type 'Module'. Type 'undefined' is not assignable to type 'CompilerJsDoc'. Type '{ [x: string]: d.TypesMemberNameData[] | undefined; }' is not assignable to type 'TypesImportData'. 'string' index signatures are incompatible. Type 'TypesMemberNameData[] | undefined' is not assignable to type 'TypesMemberNameData[]'. Type 'undefined' is not assignable to type 'TypesMemberNameData[]'. Type 'string | undefined' is not assignable to type 'string | null'. Type '((data: { file: string; line: number; column: number; }) => void) | null' is not assignable to type 'OpenInEditorCallback | undefined'. Type 'null' is not assignable to type 'OpenInEditorCallback | undefined'. Type 'null' is not assignable to type 'WebSocket'. Type 'null' is not assignable to type 'BuildOnEventRemove'. Type 'null' is not assignable to type '() => void'. Type 'null' is not assignable to type '(msg: DevServerMessage) => void'. Type 'DevServerConfig | undefined' is not assignable to type 'DevServerConfig'. Type 'undefined' is not assignable to type 'DevServerConfig'. Type 'null' is not assignable to type '{ open(openId: string): Promise; }'. Type 'string | null' is not assignable to type 'string | undefined'. Type 'null' is not assignable to type 'Promise<DevServerEditor[]>'. Type 'null' is not assignable to type '(req: IncomingMessage, res: ServerResponse, next: () => void) => void'. Type 'null' is not assignable to type 'URL'. Type 'null' is not assignable to type 'URLSearchParams'. Type 'PageReloadStrategy | undefined' is not assignable to type 'PageReloadStrategy'. Type 'undefined' is not assignable to type 'PageReloadStrategy'. Type 'null' is not assignable to type 'Server<typeof IncomingMessage, typeof ServerResponse>'. Type 'null' is not assignable to type 'DevWebSocket'. Type 'null' is not assignable to type 'DevServerContext'. Type 'DevWebSocket | null' is not assignable to type 'DevWebSocket'. Type 'null' is not assignable to type 'DevWebSocket'. Type 'null' is not assignable to type 'ChildProcess'. Type 'null' is not assignable to type 'HydrateApp'. Type '() => undefined' is not assignable to type '{ (cb?: (() => void) | undefined): TestServerResponse; (chunk: any, cb?: (() => void) | undefined): TestServerResponse; (chunk: any, encoding: BufferEncoding, cb?: (() => void) | undefined): TestServerResponse; }'. Type 'undefined' is not assignable to type 'TestServerResponse'. Type 'null' is not assignable to type 'ComponentConstructor'. Type '(this: HostElement) => Promise | undefined' is not assignable to type '() => Promise'. Type 'Promise | undefined' is not assignable to type 'Promise'. Type 'undefined' is not assignable to type 'Promise'. Type 'null' is not assignable to type 'Window & typeof globalThis'. Type 'null' is not assignable to type 'Window'. Type 'null' is not assignable to type 'Window & typeof globalThis'. Type 'null' is not assignable to type 'MockCSSStyleSheet'. Type 'null' is not assignable to type 'string | boolean'. Type 'null' is not assignable to type 'Location'. Type 'null' is not assignable to type 'MockElement'. Type 'null' is not assignable to type 'SVGSVGElement'. Type 'null' is not assignable to type 'SVGElement'. Type 'null' is not assignable to type 'EventTarget'. Type 'null' is not assignable to type 'MockEventListener[]'. Type 'null' is not assignable to type 'MockDocument'. Type '{ name: string; value: string; namespace: string | null; prefix: null; }[]' is not assignable to type 'Attribute[]'. Type '{ name: string; value: string; namespace: string | null; prefix: null; }' is not assignable to type 'Attribute'. Types of property 'namespace' are incompatible. Type 'string | null' is not assignable to type 'string | undefined'. Type '(element: MockElement) => string | null' is not assignable to type '(element: unknown) => string'. Type 'string | null' is not assignable to type 'string'. Type 'null' is not assignable to type 'string'. Type 'ParentNode | null' is not assignable to type 'Node'. Type 'null' is not assignable to type 'Node'. Type 'null' is not assignable to type 'Document'. Type 'string | null | undefined' is not assignable to type 'string | undefined'. Type 'never[] | null' is not assignable to type 'RenderNode[]'. Type 'null' is not assignable to type 'RenderNode[]'. Type 'null' is not assignable to type 'VNode[]'. Type 'null' is not assignable to type 'string | number | undefined'. Type 'null' is not assignable to type 'string | number | Function'. Type 'RenderNode | null' is not assignable to type 'RenderNode'. Type 'null' is not assignable to type 'RenderNode'. Type 'HTMLElement | null' is not assignable to type 'EventTarget'. Type 'null' is not assignable to type 'EventTarget'. Type 'string | null | undefined' is not assignable to type 'string | undefined'. Type 'null' is not assignable to type 'string | undefined'. Type 'null' is not assignable to type 'Set | undefined'. Type 'null' is not assignable to type '[string, any][] | undefined'. Type 'VNode[] | undefined' is not assignable to type 'VNode[]'. Type 'undefined' is not assignable to type 'VNode[]'. Type '(props: {}, children: VNode[], utils: FunctionalUtilities) => null' is not assignable to type 'FunctionalComponent<{}>'. Type 'null' is not assignable to type 'VNode | VNode[]'. Type '() => null' is not assignable to type 'FunctionalComponent<{}>'. Type 'null' is not assignable to type 'VNode | VNode[]'. Type 'null' is not assignable to type 'VNode'. Type 'undefined' is not assignable to type 'VNode'. Type 'RenderNode | undefined' is not assignable to type 'RenderNode'. Type 'undefined' is not assignable to type 'RenderNode'. Type 'RelocateNodeData | undefined' is not assignable to type 'RelocateNodeData'. Type 'undefined' is not assignable to type 'RelocateNodeData'. Type 'ChildNode | null' is not assignable to type 'Node'. Type 'null' is not assignable to type 'Node'. Type 'null' is not assignable to type 'ScreenshotBuild'. Type 'null' is not assignable to type 'ScreenshotCache'. Type 'null' is not assignable to type 'Buffer'. Type 'null' is not assignable to type 'Screenshot'. Type '(() => void) | undefined' is not assignable to type '() => any'. Type 'undefined' is not assignable to type '() => any'. Type '() => null' is not assignable to type '(opts: { rootDir: string; moduleId: string; path: string; }) => string'. Type 'null' is not assignable to type 'string'. Type '() => null' is not assignable to type '(opts: { moduleId: string; path?: string | undefined; version?: string | undefined; }) => string'. Type 'null' is not assignable to type 'string'. Type '() => string | undefined' is not assignable to type '() => string'. Type 'string | undefined' is not assignable to type 'string'. Type 'undefined' is not assignable to type 'string'. Type 'number | null' is not assignable to type 'number'. Type 'null' is not assignable to type 'number'. Type 'any[] | undefined' is not assignable to type 'any[]'. Type 'undefined' is not assignable to type 'any[]'. Type 'boolean | null | undefined' is not assignable to type 'boolean | undefined'. Type 'null' is not assignable to type 'ConfigBundle[] | undefined'. Type 'null' is not assignable to type 'OutputTarget[] | undefined'. Type 'null' is not assignable to type 'TestingConfig | undefined'. Type 'null' is not assignable to type 'Cache'. Type 'null' is not assignable to type '{ access: (filePath: string) => Promise; accessSync: (filePath: string) => boolean; cancelDeleteDirectoriesFromDisk: (dirPaths: string[]) => void; cancelDeleteFilesFromDisk: (filePaths: string[]) => void; ... 17 more ...; writeFiles: (files: { ...; } | Map<...>, opts?: FsWriteOptions | undefined) => Promise...'. Type 'HostRef | undefined' is not assignable to type 'HostRef'. Type 'undefined' is not assignable to type 'HostRef'. Type 'Function | undefined' is not assignable to type 'Function'. Type 'undefined' is not assignable to type 'Function'. Type 'RafCallback | undefined' is not assignable to type 'Function'. Type 'undefined' is not assignable to type 'Function'. Type 'QueuedLoadModule | undefined' is not assignable to type 'QueuedLoadModule'. Type 'undefined' is not assignable to type 'QueuedLoadModule'. Type 'null' is not assignable to type 'ElementHandle'. Type 'null' is not assignable to type 'E2EPageInternal'. Type 'ElementHandle | null' is not assignable to type 'ElementHandle'. Type 'null' is not assignable to type 'ElementHandle'. Type 'ElementHandle | null' is not assignable to type 'ElementHandle'. Type 'null' is not assignable to type 'ElementHandle'. Type 'ElementHandle | null' is not assignable to type 'ElementHandle | null'. Type 'ElementHandle' is not assignable to type 'ElementHandle'. Type 'Node' is missing the following properties from type 'Element': attributes, classList, className, clientHeight, and 114 more. Type 'null' is not assignable to type 'Promise<JSHandle>'. Type '(a?: any, b?: any) => Promise<ScreenshotDiff | undefined>' is not assignable to type '{ (): Promise; (description: string): Promise; (opts: ScreenshotOptions): Promise<...>; (description: string, opts: ScreenshotOptions): Promise<...>; }'. Type 'Promise<ScreenshotDiff | undefined>' is not assignable to type 'Promise'. Type 'ScreenshotDiff | undefined' is not assignable to type 'ScreenshotDiff'. Type 'undefined' is not assignable to type 'ScreenshotDiff'. Type 'null' is not assignable to type 'CompilerWatcher'. Type 'null' is not assignable to type 'Promise'. Type 'Browser | null' is not assignable to type 'Browser'. Type 'null' is not assignable to type 'Browser'. Type 'null' is not assignable to type 'ValidatedConfig'. Type 'null' is not assignable to type 'Browser'. Type 'null' is not assignable to type 'SourceMap'. Type 'null' is not assignable to type 'PackageJsonData'. Type 'null' is not assignable to type '{ [moduleId: string]: string; } | undefined'.
TS18047	167	Error messages 'var1' is possibly 'null'. 'configFileData' is possibly 'null'. 'canonicalLinkElm.parentNode' is possibly 'null'. 'link.parentNode' is possibly 'null'. 'href' is possibly 'null'. 'stencilScriptElm.parentNode' is possibly 'null'. 'attr' is possibly 'null'. 't.cmp' is possibly 'null'. 't.event' is possibly 'null'. 't.property' is possibly 'null'. 'appErrorElm.parentNode' is possibly 'null'. 'progressBar.parentNode' is possibly 'null'. 'serverProcess.stdout' is possibly 'null'. 'serverProcess.stderr' is possibly 'null'. 'node.nodeName' is possibly 'null'. 'element.nodeName' is possibly 'null'. 'nodeValue' is possibly 'null'. 'cloned' is possibly 'null'. 'clonedDiv' is possibly 'null'. 'clonedTemplate' is possibly 'null'. 'clonedTemplate.content.firstChild' is possibly 'null'. 'clonedTemplate.content.firstChild.textContent' is possibly 'null'. 'clonedWin' is possibly 'null'. 'titleElm' is possibly 'null'. 'doc.body.firstElementChild' is possibly 'null'. 'doc.body.firstElementChild.firstElementChild' is possibly 'null'. 'tmplElm.content.firstChild' is possibly 'null'. 'doc.firstElementChild' is possibly 'null'. 'doc.lastChild' is possibly 'null'. 'dstWin' is possibly 'null'. 'orgLocationNode.parentNode' is possibly 'null'. 'node.nodeValue' is possibly 'null'. 'node.parentNode' is possibly 'null'. 'appendAfter.parentNode' is possibly 'null'. 'hostElm.firstElementChild' is possibly 'null'. 'hostElm.lastElementChild' is possibly 'null'. 'nodeRef.nodeValue' is possibly 'null'. 'nodeRef.parentNode' is possibly 'null'. 'parentNode' is possibly 'null'. 'defaultHolder.parentNode' is possibly 'null'. 'nodeToRelocate.parentNode' is possibly 'null'. 'w' is possibly 'null'. 'elm.textContent' is possibly 'null'. 'rsp' is possibly 'null'. 'p.params' is possibly 'null'. 'head' is possibly 'null'.
TS2532	61	Error messages Object is possibly 'undefined'.
TS2454	45	Error messages Variable 'pkgJsonData' is used before being assigned. Variable 'minifyOpts' is used before being assigned. Variable 'workerCtrl' is used before being assigned. Variable 'timespan' is used before being assigned. Variable 'content' is used before being assigned. Variable 'compilerExe' is used before being assigned. Variable 'declarationOutputText' is used before being assigned. Variable 'outputText' is used before being assigned. Variable 'importResolvedFile' is used before being assigned. Variable 'win' is used before being assigned. Variable 'attrName' is used before being assigned. Variable 'oldValue' is used before being assigned. Variable 'newValue' is used before being assigned. Variable 'hostId' is used before being assigned. Variable 'promise' is used before being assigned. Variable 'textContent' is used before being assigned. Variable 'resolve' is used before being assigned. Variable 'opts' is used before being assigned.
TS2722	39	Error messages Cannot invoke an object which is possibly 'undefined'.
TS2531	37	Error messages Object is possibly 'null'.
TS2352	19	Error messages Conversion of type 'null' to type 'CompilerSystem' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first. Conversion of type 'null' to type 'string' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first. Conversion of type 'null' to type 'string[]' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first. Conversion of type '{ cmps: never[]; }' to type 'Module' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first. Type '{ cmps: never[]; }' is missing the following properties from type 'Module': coreRuntimeApis, collectionName, dtsFilePath, excludeFromCollection, and 27 more. Conversion of type 'null' to type 'ScreenshotCache' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.
TS2769	12	Error messages No overload matches this call. Overload 1 of 2, '(type: keyof DocumentEventMap, listener: (this: Document, ev: PointerEvent | MouseEvent | UIEvent | Event | ErrorEvent | ... 13 more ... | WheelEvent) => any, options?: boolean | ... 1 more ... | undefined): void', gave the following error. Argument of type '"e"' is not assignable to parameter of type 'keyof DocumentEventMap'. Overload 2 of 2, '(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions | undefined): void', gave the following error. Argument of type 'null' is not assignable to parameter of type 'EventListenerOrEventListenerObject'. No overload matches this call. Overload 1 of 2, '(o: {}): string[]', gave the following error. Argument of type 'BuildResultsComponentGraph | undefined' is not assignable to parameter of type '{}'. Type 'undefined' is not assignable to type '{}'. Overload 2 of 2, '(o: object): string[]', gave the following error. Argument of type 'BuildResultsComponentGraph | undefined' is not assignable to parameter of type 'object'. Type 'undefined' is not assignable to type 'object'. No overload matches this call. Overload 1 of 4, '(object: {}, method: never): SpyInstance<never, never>', gave the following error. Argument of type 'CompilerWorkerContext | undefined' is not assignable to parameter of type '{}'. Type 'undefined' is not assignable to type '{}'. Overload 2 of 4, '(object: {}, method: never): SpyInstance<never, never>', gave the following error. Argument of type 'CompilerWorkerContext | undefined' is not assignable to parameter of type '{}'. Type 'undefined' is not assignable to type '{}'. No overload matches this call. The last overload gave the following error. Argument of type 'string | null' is not assignable to parameter of type '(substring: string, ...args: any[]) => string'. Type 'null' is not assignable to type '(substring: string, ...args: any[]) => string'. No overload matches this call. The last overload gave the following error. Argument of type 'string | undefined' is not assignable to parameter of type 'string | RegExp'. Type 'undefined' is not assignable to type 'string | RegExp'. No overload matches this call. Overload 1 of 2, '(configFileName: string, optionsToExtend: CompilerOptions | undefined, system: System, createProgram?: CreateProgram | undefined, reportDiagnostic?: DiagnosticReporter | undefined, reportWatchStatus?: WatchStatusReporter | undefined, watchOptionsToExtend?: WatchOptions | undefined, extraFileExtensions?: readonly FileExtensionInfo[] | undefined): WatchCompilerHostOfConfigFile<...>', gave the following error. Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'. Overload 2 of 2, '(rootFiles: string[], options: CompilerOptions, system: System, createProgram?: CreateProgram | undefined, reportDiagnostic?: DiagnosticReporter | undefined, reportWatchStatus?: WatchStatusReporter | undefined, projectReferences?: readonly ProjectReference[] | undefined, watchOptions?: WatchOptions | undefined): WatchCompilerHostOfFilesAndCompilerOptions<...>', gave the following error. Argument of type 'string | undefined' is not assignable to parameter of type 'string[]'. Type 'undefined' is not assignable to type 'string[]'. No overload matches this call. Overload 1 of 2, '(timeoutId: string | number | Timeout | undefined): void', gave the following error. Argument of type 'Timeout | null' is not assignable to parameter of type 'string | number | Timeout | undefined'. Type 'null' is not assignable to type 'string | number | Timeout | undefined'. Overload 2 of 2, '(id: number | undefined): void', gave the following error. Argument of type 'Timeout | null' is not assignable to parameter of type 'number | undefined'. Type 'null' is not assignable to type 'number | undefined'. No overload matches this call. Overload 1 of 2, '(timeoutId: string | number | Timeout | undefined): void', gave the following error. Argument of type 'Timeout | null' is not assignable to parameter of type 'string | number | Timeout | undefined'. Overload 2 of 2, '(id: number | undefined): void', gave the following error. Argument of type 'Timeout | null' is not assignable to parameter of type 'number | undefined'. No overload matches this call. Overload 1 of 3, '(p: string, encoding: "utf8"): Promise', gave the following error. Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'. Overload 2 of 3, '(p: string, encoding: "binary"): Promise', gave the following error. Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'. No overload matches this call. Overload 1 of 2, '(values: [] | readonly unknown[]): Promise<unknown[] | []>', gave the following error. Argument of type 'Promise[] | undefined' is not assignable to parameter of type '[] | readonly unknown[]'. Type 'undefined' is not assignable to type '[] | readonly unknown[]'. Overload 2 of 2, '(values: Iterable<void | PromiseLike>): Promise<void[]>', gave the following error. Argument of type 'Promise[] | undefined' is not assignable to parameter of type 'Iterable<void | PromiseLike>'. Type 'undefined' is not assignable to type 'Iterable<void | PromiseLike>'.
TS2790	10	Error messages The operand of a 'delete' operator must be optional.
TS2538	8	Error messages Type 'undefined' cannot be used as an index type. Type 'null' cannot be used as an index type.
TS2344	5	Error messages Type 'T' does not satisfy the constraint 'Answers'.
TS2416	5	Error messages Property 'get' in type 'Cache' is not assignable to the same property in base type 'Cache'. Type '(key: string) => Promise<string | null>' is not assignable to type '(key: string) => Promise'. Type 'Promise<string | null>' is not assignable to type 'Promise'. Type 'string | null' is not assignable to type 'string'. Type 'null' is not assignable to type 'string'. Property 'getMemoryStats' in type 'Cache' is not assignable to the same property in base type 'Cache'. Type '() => string | null' is not assignable to type '() => string'. Type 'string | null' is not assignable to type 'string'. Type 'null' is not assignable to type 'string'. Property 'find' in type 'E2EElement' is not assignable to the same property in base type 'E2EElementInternal'. Type '(selector: string) => Promise<E2EElement | null>' is not assignable to type '(selector: FindSelector) => Promise'. Type 'Promise<E2EElement | null>' is not assignable to type 'Promise'. Type 'E2EElement | null' is not assignable to type 'E2EElement'. Type 'null' is not assignable to type 'E2EElement'. Property 'findAll' in type 'E2EElement' is not assignable to the same property in base type 'E2EElementInternal'. Type '(selector: string) => Promise<E2EElement[]>' is not assignable to type '(selector: FindSelector) => Promise<E2EElement[]>'. Type 'Promise<import("/home/runner/work/stencil/stencil/src/testing/puppeteer/puppeteer-element").E2EElement[]>' is not assignable to type 'Promise<import("/home/runner/work/stencil/stencil/src/testing/puppeteer/puppeteer-declarations").E2EElement[]>'. Type 'import("/home/runner/work/stencil/stencil/src/testing/puppeteer/puppeteer-element").E2EElement[]' is not assignable to type 'import("/home/runner/work/stencil/stencil/src/testing/puppeteer/puppeteer-declarations").E2EElement[]'. Type 'import("/home/runner/work/stencil/stencil/src/testing/puppeteer/puppeteer-element").E2EElement' is not assignable to type 'import("/home/runner/work/stencil/stencil/src/testing/puppeteer/puppeteer-declarations").E2EElement'. The types returned by 'find(...)' are incompatible between these types. Type 'Promise<E2EElement | null>' is not assignable to type 'Promise'. Property 'getComputedStyle' in type 'E2EElement' is not assignable to the same property in base type 'E2EElementInternal'. Type '(pseudoElt?: string | null | undefined) => Promise' is not assignable to type '(pseudoElt?: string | null | undefined) => Promise'. Type 'Promise' is not assignable to type 'Promise'. Type 'unknown' is not assignable to type 'CSSStyleDeclaration'.
TS18049	3	Error messages 'scriptElm' is possibly 'null' or 'undefined'.
TS2493	3	Error messages Tuple type '[]' of length '0' has no element at index '0'.
TS2488	2	Error messages Type 'Diagnostic[] | undefined' must have a 'Symbol.iterator' method that returns an iterator. Type 'string[] | undefined' must have a 'Symbol.iterator' method that returns an iterator.
TS2774	2	Error messages This condition will always return true since this function is always defined. Did you mean to call it instead?
TS18046	2	Error messages 'style' is of type 'unknown'.
TS2684	1	Error messages The 'this' context of type 'ResolveIdHook | undefined' is not assignable to method's 'this' of type 'Function'. Type 'undefined' is not assignable to type 'Function'.
TS2464	1	Error messages A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
TS2430	1	Error messages Interface 'SerializeOpts' incorrectly extends interface 'SerializeCssOptions'. Types of property 'usedSelectors' are incompatible. Type 'UsedSelectors | null' is not assignable to type 'UsedSelectors | undefined'. Type 'null' is not assignable to type 'UsedSelectors | undefined'.

Unused exports report

There are 10 unused exports on this PR. That's the same number of errors on main, so at least we're not creating new ones!

Unused exports

File	Line	Identifier
src/runtime/bootstrap-lazy.ts	15	setNonce
src/screenshot/screenshot-fs.ts	18	readScreenshotData
src/testing/testing-utils.ts	186	withSilentWarn
src/compiler/app-core/app-data.ts	3	BUILD
src/compiler/app-core/app-data.ts	92	Env
src/compiler/app-core/app-data.ts	94	NAMESPACE
src/compiler/fs-watch/fs-watch-rebuild.ts	111	updateCacheFromRebuild
src/testing/platform/testing-platform.ts	30	cssVarShim
src/testing/puppeteer/puppeteer-declarations.ts	485	WaitForEventOptions
src/client/polyfills/css-shim/utils.ts	2	GLOBAL_SCOPE

[alicewriteswrongs]

one little note

[alicewriteswrongs]

this 'visitor' is closely based on the one found in https://github.com/ionic-team/stencil/blob/main/src/compiler/transformers/map-imports-to-path-aliases.ts. It's basically just been modified to not be dependent on output target-specific stuff.

[tanner-reits]

Overall, things are looking good and I'm on board with doing these transformations globally (if they don't break any output we generate obviously). Called out a couple small things (mostly suggestions/thoughts).

I'll test this out on a few things locally too.

Do we need the specific transformer from #3523 anymore with this change? I guess that one would still have an impact if you set transformAliasedImportPaths: false in the Stencil config, but had transformAliasedImportPaths: true in the dist-collection output target config. We may want to think about that behavior a bit since it feels confusing to have the same flag/control available at different levels

[tanner-reits]

Not sure how this change found it's way into this PR 🤔

[rwaskiewicz]

Probably a case of v3.1-feature being created before we updated Prettier, but this feature branch being created with it?

[rwaskiewicz]

But I agree, we should rm this (likely by rebasing the 3.1 feature branch on main, then this off the 3.1 feature branch)

[alicewriteswrongs]

oops haha

I should inspect the diff before I open the PR!

[tanner-reits]

Not about this line, just a general comment about the file. Can we update the name of this file to be kebab-case instead of snake-case (i.e. rewrite-aliased-paths.ts)

[tanner-reits]

Just a thought, but what do you think about a function name like rewriteAliasedDTSImportPaths()?

[alicewriteswrongs]

It's a bit on the long side, but I'm fine with it 👍

[tanner-reits]

Same idea as above: rewriteAliasedSourceFileImportPaths

Also, just feels strange one of these is a function and one a const... makes no functional difference, just something I noticed

[alicewriteswrongs]

sure, consistency is fine by me!

[alicewriteswrongs]

ok I had some scratch work on this branch about trying to do the same thing in tests, and when trying to remove that I messed up the rebase (oops) so the easiest thing was to just re-push as a single new commit - sorry for losing the history!

@tanner-reits I made the changes you suggested

[alicewriteswrongs]

Also to answer your question, I believe if you have the global transformAliasedImportPaths set to true then yeah, the dist-collection one set to true (or false!) it would not do anything.

I think my preference would be to have one global option, since it's not clear to me that you'd want to set this differently on a per-output-target basis, but I think if we wanted to do that we would need to first mark the dist-collection specific option as deprecated and then remove it later on. Which is kind of a pain. But in any case, I didn't touch that code in this change because I didn't want to break any current behavior (for the same reason this is added as an opt-in behavior, rather than defaulting to doing this path transformation).

[rwaskiewicz]

Had a few questions/clarifications - once those are resolved, can we add:

• Documentation in the next directory of docs
• Notion page for flags that we may flip in the future for a major version of Stencil (like we did for v3?)
• Tests for rewrite-aliased-paths
  • I think using the test/transpile fn, we could just pass the new transformer to the transpileModule() fn

[rwaskiewicz]

Might be worth saying this is updating import paths themselves:

Suggested change

	* Transform modules aliased with `paths` in `tsconfig.json` to relative
	* Transform module import paths aliased with `paths` in `tsconfig.json` to relative

[rwaskiewicz]

Minor, duplicate 'to' between this line and the previous one

Suggested change

	* to a relative path from the importer to the importee.
	* a relative path from the importer to the importee.

[rwaskiewicz]

Suggested change

	* said that resolving these module identifiers is the responsability of module
	* said that resolving these module identifiers is the responsibility of module

[alicewriteswrongs]

man I do that one all the time

idk why, I feel like it should be response-ability I guess haha

[rwaskiewicz]

Could we move this updateImportDeclaration call to be inside the conditional that checks if the importPath starts with a period? Otherwise, aren't we doing work updating the import declaration that we don't need to do (and should just return the node as it was)?

[rwaskiewicz]

To make sure I understand, is there a way for import declarations to occur somewhere other than the outermost scope of a TypeScript file? If so, I think this totally makes sense to recurse and update all import declarations. I think I'm just having a little brain fog this morning and can't think of a place where it'd be allowed.

I know that we can do dynamic imports like:

import 'foo'; // <--- import declaration
async function bar() {
    await import("baz"); // <-- AwaitExpression (CallExpression (ImportKeyword StringLiteral))
}

but those appear to be call expr's in TS AST explorer. Is there something I'm not thinking of? (Probably 😅)

[rwaskiewicz]

If we don't need to recurse, we might be able do something like:

export function rewriteAliasedDTSImportPaths_RyanTest(): ts.TransformerFactory<ts.Bundle | ts.SourceFile> {
  return (transformCtx: ts.TransformationContext) => {

    return (tsBundleOrSourceFile) => {
      const tsSourceFile = ts.isBundle(tsBundleOrSourceFile)
        ? tsBundleOrSourceFile.getSourceFile()
        : tsBundleOrSourceFile;


      const s = tsSourceFile.statements;
      const importStatements = s.filter(ts.isImportDeclaration);

      // update logic for import declarations (nodes) getting updated
    };
  };
}

But I haven't fully tested that theory out, since I'm convinced I'm missing something in the first part above

[alicewriteswrongs]

I poked around a bit and found that the following (contrived) example does seem to be valid TypeScript:

namespace Foo {
    export function foobar () {
        return 2;
    }
}

namespace Bar {
    import foo = Foo;

    export const baz = foo.foobar;
}

(TS playground link for that snippet)

However, if you take a look at the AST for that snippet, happily the import foo = Foo; bit is not a ts.ImportDeclaration, but a ts.ImportEqualsDeclaration, and I don't think that TypeScript will allow a normal import declaration within a namespace (I could be wrong though). So that would suggest we could get by with filtering on the top-level statements in a ts.SourceFile.

In the future, however, if the module declarations proposal get accepted as part of the ECMAScript standard (it's currently stage 2) then I think it would be possible to have something like this:

module Foo {
  import fs from 'fs';
  export const myFileSync = fs.readFileSync;
}

so in the interests of future-proofing we might want to keep the recursion around.

Thoughts?

[rwaskiewicz]

I struggle with this decision (or, my opinion on it 😆). IIUC, the module declarations proposal just hit Stage 2 this past November - I think I'd err on the side of YAGNI - and if we do need it in the future:

1. This probably won't be the only change we'll need to make, and I can see value in looking at the solution for module declarations holistically
2. We have git history, and can recover this original impl and reuse it if needed

[alicewriteswrongs]

I think that makes sense, it's not going to be that difficult to retrofit recursion back in if we turn out to need it.

I'm going to finish tests for the current implementation first and then look at swapping things out, just to have some assurance that things are working as I think they are.

[alicewriteswrongs]

alright so I just pushed a change that did a bit of a refactor on the rewrite-aliased-paths module to avoid recurring down the whole tree, lmk what you think!

[rwaskiewicz]

This regex (I think) would look something like:

 .ts$|.tsx$|.d.ts$|.js$|.jsx$|.json$|.tsbuildinfo$|.mjs$|.mts$|.d.mts$|.cjs$|.cts$|.d.cts$

Which I think is fine, as we're using ts.Extension elsewhere in the codebase (the potential problem being that this enum is defined by TypeScript, and can change w/o us knowing). However, we've assumed that risk already, so I don't think that's much of a problem.

Does this current regex make sense for our purposes? I think so, but wanted to double check with the team as a whole.

[alicewriteswrongs]

I think this should work alright for us, and I'd rather that the TypeScript devs maintain it than us I think!

[rwaskiewicz]

Can we add this to src/compiler/transpile/transpile-module.ts#transpileModule as well for single string compilation?

[alicewriteswrongs]

Sure, that makes sense to me

[alicewriteswrongs]

just added tests, pointing out a few things with them

[alicewriteswrongs]

in order for these tests to work TypeScript needs to be able to resolve the files we're importing from, so here in this little helper function we instantiate an in-memory FS and write two little modules to it. TypeScript is patched to read from the in-memory FS, so when we try to resolve modules in our transformer it will see these.

[alicewriteswrongs]

I had to add these two options to 1) set the afterDeclarations transformers and 2) override some of the TS compiler options set before the transpilation happens.

[alicewriteswrongs]

this is just the same as what was here before just alphabetized, reformatted as an object literal, and adding in the tsConfig param.

[alicewriteswrongs]

alphabetization here too, only addition is declarationOutputText

[rwaskiewicz]

@alicewriteswrongs can you take a look at the unit tests again? Looks like they're failing in CI ATM

[alicewriteswrongs]

ah looks like there's something that doesn't work correctly in node 14. I installed v14.21.3 locally and I can make the tests pass. I'll try to do some git bisect to figure out what's up

[alicewriteswrongs]

I'm not sure what's going on, I checked out main and changed the node version to 14.21.3 and got the same test failures when running the unit tests there, something strange is afoot here...

[alicewriteswrongs]

definitely funky, so the tests on this branch all pass 100% (at least locally on my machine) with node v14.21.0, but if I use v14.21.1 I get test failures similar to the ones observable in the CI.

The strange thing is, it looks like 14.21.1 was released in November: https://nodejs.org/en/download/releases/ (2022-11-04 to be specific) so I'm a little puzzled why we wouldn't have seen these issues before 🤔

[alicewriteswrongs]

actually scratch that, something is wrong on this branch - I wasn't doing a jest --clearCache in between runs so some cached stuff was hanging around and causing problems.

[alicewriteswrongs]

alright sorry for all the noise - turns out this was a probably with too-eagerly-enabling the transformer in transpileModule, I added a flag to the transpilation options to control it and that should address the issue

[alicewriteswrongs]

Looks like there is still a test failure but this time only on Windows, trying to dig into that a bit more. I'll ping when that's resolved.