TypeScript for tslab

Changes from TypeScript

Base version: v5.0.4

• Exports findPrecedingToken and findNextToken from services/utilities.ts.
• Exports Completions.getCompletionsAtPosition from services/completions.ts with exportable arguments (getCompletionsAtPositionForTslab).
• Exports getDefaultTypeRoots from compiler/moduleNameResolver.ts
• Exports locals from SourceFile.
• Exports getDefaultTypeRoots from compiler/moduleNameResolver.ts.
• Defines ts.getQuickInfoAtPosition.
• Defines ts.getPreEmitDiagnosticsOfFiles.
• Remove "bin" from package.json.
• Remove "should be acknowledged when they change" from unittests/publicApi.ts to skip the compatibility validation.
• Add disableTopLevelAwait to the compiler options to support TLA properly in tslab.
• Add getNullTransformationContext to export nullTransformationContext.

Merge with a newer version of TypeScript

• Fetch a new release: git fetch upstream
• Back to "Updates for tslab" commit: git reset --hard HEAD@{2}
• Rebase the commit to the new tag: git rebase -i --onto v3.7.3 v3.7.2 master

Release

Build

npm ci && npm run gulp lint && npm run gulp runtests && npm run gulp LKG && npm run gulp clean

publish

Set the new version in package.json

yarn semver "3.6.4-tslab" -i prerelease --preid tslab

Then, build the compiler and run:

npm publish --access=public

Note that --access=public is necessary because Scoped packages are private by default.

Notes for TypeScript codebase

• Files included in typescript.js are defined in src/typescript.ts with import * as ts from "./_namespaces/ts";. For example, when we want to add a new file in src/services, add a reference to the new file in src/services/_namespaces/ts.ts.

TypeScript

TypeScript is a language for application-scale JavaScript. TypeScript adds optional types to JavaScript that support tools for large-scale JavaScript applications for any browser, for any host, on any OS. TypeScript compiles to readable, standards-based JavaScript. Try it out at the playground, and stay up to date via our blog and Twitter account.

Find others who are using TypeScript at our community page.

Installing

For the latest stable version:

npm install -g typescript

For our nightly builds:

npm install -g typescript@next

Contribute

There are many ways to contribute to TypeScript.

• Submit bugs and help us verify fixes as they are checked in.
• Review the source code changes.
• Engage with other TypeScript users and developers on StackOverflow.
• Help each other in the TypeScript Community Discord.
• Join the #typescript discussion on Twitter.
• Contribute bug fixes.

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.

Documentation

• TypeScript in 5 minutes
• Programming handbook
• Homepage

Roadmap

For details on our planned features and future direction please refer to our roadmap.