🌐 Web query:

Does TypeScript support brace expansion in tsconfig.json includeglobs (e.g.,"*.config.{ts,js,mjs,cjs}")? Please cite official TypeScript documentation or source code behavior.

💡 Result:

No. TypeScript’s tsconfig.json include/exclude glob patterns do not support Bash-style brace expansion like {ts,js,mjs,cjs}. TypeScript documents include as “filenames or patterns” and specifies only wildcard characters , ?, and / for its tsconfig globbing. The official docs list those supported wildcard characters and do not mention brace sets as a supported feature. Additionally, TypeScript’s own issue tracker documents that “curly braces aren't supported in our glob patterns” in the context of tsconfig include patterns. Practical implication: a pattern such as ".config.{ts,js,mjs,cjs}" will not be interpreted as multiple extensions by the TypeScript compiler; you need to spell out separate include patterns (e.g., ".config.ts", ".config.js", etc.) or use other mechanisms (like multiple tsconfig files / tooling) to cover those extensions.

Citations:

• 1: https://www.typescriptlang.org/tsconfig/
• 2: Visual studio and VS code don't apply tsconfig.json if it uses braces in glob microsoft/TypeScript#13062
• 3: Adds glob-style pattern matching for files in tsconfig.json microsoft/TypeScript#5980

‼️ IMPORTANT
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🌐 Web query:

In TypeScript tsconfig.json, does the includeglob syntax support brace expansion patterns like*.config.{ts,js,mjs,cjs}? Please cite official TypeScript documentation or source references for supported glob tokens.

💡 Result:

No. TypeScript’s tsconfig.json “include” glob syntax does not support brace expansion patterns like *.config.{ts,js,mjs,cjs}. Official TypeScript documentation states that “include”/“exclude” support only the wildcard characters * and ? and the special recursive token /, and it describes those as the supported glob wildcards. It does not mention brace/group expansion as supported. TypeScript’s own source for the include/exclude glob feature also lists supported tokens as , ?, and /, and explicitly notes that character escape sequences and character ranges are not supported—indicating that its glob syntax is intentionally limited rather than full brace-expansion syntax. Additionally, TypeScript maintainers have discussed brace usage not working in tsconfig patterns (e.g., curly braces not supported in glob patterns), corroborating that .{...} style expansion isn’t handled. Supported tokens (from TypeScript docs/source): - * matches zero or more characters (excluding directory separators) - ? matches any one character (excluding directory separators) - / recursively matches any subdirectory Therefore, to include multiple extensions in tsconfig.json, you need separate patterns (e.g., /.ts, /.js, etc.) rather than a single brace-expanded pattern.

Citations:

• 1: https://www.typescriptlang.org/tsconfig/
• 2: https://www.typescriptlang.org/tsconfig
• 3: Adds glob-style pattern matching for files in tsconfig.json microsoft/TypeScript#5980
• 4: Visual studio and VS code don't apply tsconfig.json if it uses braces in glob microsoft/TypeScript#13062

🌐 Web query:

Does TypeScript tsconfig.json includesupport brace expansion patterns like"*.config.{ts,js,mjs,cjs}"? Please answer from official TypeScript docs and list supported wildcard syntax.

💡 Result:

No. TypeScript’s official tsconfig.json include/exclude glob syntax does not support brace expansion patterns like ".config.{ts,js,mjs,cjs}". Supported wildcard syntax for include and exclude in tsconfig.json (per the TypeScript TSConfig Reference): - * matches zero or more characters (excluding directory separators) - ? matches any one character (excluding directory separators) - / matches any directory nested to any level TypeScript’s docs explicitly describe only those wildcard characters for glob patterns in include/exclude, and do not list any support for {a,b} brace expansion. Practical implication: to include multiple extensions, you must use separate patterns (for example, /.config.ts, /*.config.js, etc.) rather than {ts,js,...}.

Citations:

• 1: https://www.typescriptlang.org/tsconfig/
• 2: https://www.typescriptlang.org/tsconfig
• 3: Adds glob-style pattern matching for files in tsconfig.json microsoft/TypeScript#5980

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

🌐 Web query:

Does TypeScript's tsconfig.json "include" glob support brace expansion patterns like "*.config.{ts,js,mjs,cjs}"? Please provide official TypeScript documentation/source references.

💡 Result:

No. TypeScript’s tsconfig.json “include”/“exclude” glob patterns do not support brace expansion syntax like "*.config.{ts,js,mjs,cjs}". Officially, TypeScript documents that it supports only wildcard characters for tsconfig include/exclude patterns: *, ?, and / (and related rules). There is no mention of brace-expansion-style {a,b} patterns. Additionally, TypeScript’s own issue tracker records that “curly braces aren’t supported in our glob patterns”. What to do instead: spell out multiple patterns explicitly, e.g. include entries for *.config.ts, *.config.js, etc., or generate the expanded list with your tooling (since tsconfig itself won’t expand braces).

Citations:

• 1: https://www.typescriptlang.org/tsconfig
• 2: Visual studio and VS code don't apply tsconfig.json if it uses braces in glob microsoft/TypeScript#13062

🌐 Web query:

TypeScript tsconfig include glob syntax: are brace patterns like "*.config.{ts,js,mjs,cjs}" supported, or are only "*", "?", and "**/" supported?

💡 Result:

No, brace patterns like ".config.{ts,js,mjs,cjs}" are not supported in TypeScript tsconfig include. Only basic glob patterns "", "?", and "/" are supported, along with special handling for "." patterns where only supported file extensions are considered. To match multiple extensions like ts, js, mjs, cjs, you must list them separately: [".config.ts", ".config.js", ".config.mjs", ".config.cjs"].

Citations:

• 1: Adds glob-style pattern matching for files in tsconfig.json microsoft/TypeScript#5980
• 2: https://stackoverflow.com/questions/78721719/tsconfig-json-glob-patterns-e-g-ts-js-do-not-work-is-this-a-bug-or-exp
• 3: https://www.typescriptlang.org/tsconfig/
• 4: Visual studio and VS code don't apply tsconfig.json if it uses braces in glob microsoft/TypeScript#13062
• 5: https://www.typescriptlang.org/tsconfig