Conditional types by ahejlsberg · Pull Request #21316 · microsoft/TypeScriptYou signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session. Dismiss alert
Tag types · Issue #4895 · microsoft/TypeScript
Problem There is no straight way to encode a predicate (some checking) about a value in its type. Details There are situations when a value has to pass some sort of check/validation prior to being used. For example: a min/max functions can only operate on a non-empty array so there must be a check if a given array has any elements. If we pass a plain array that might as well be empty, then we need
Design Proposal: Leverage `side-effects: false` in package.json for tree-shaking friendly modules · Issue #19202 · microsoft/TypeScript
Before You Start I think this design proposal aligns with TypeScript Design Goals and helps TypeScript authors to write more efficient packages (and help the JavaScript ecosystem in general this way). The are very similar existing suggestions, but it looks like none of them leverages side-effects: false in package.json directly. E.g. there is Add pure and immutable keywords to ensure code has no u
Add settings for multiple environments in tsconfig.json · Issue #9835 · microsoft/TypeScript
Suggestion In order to compile development, test, and production builds as part of a larger pipeline As a team project build administrator I want to be able to define different compiler settings for different environments in tsconfig.json Provide a feature similar to the babelrc file env option so one tsconfig.json file can support multiple environments. It is very cumbersome to have to maintain m
Support `.mjs` output · Issue #18442 · microsoft/TypeScript
Experimental support for ES modules just landed in Node 8.5 (changelog, PR). Since ES modules have some parsing and semantic differences, Node decided to use the mjs extension for ES modules (while js is for the "script" target and commonjs modules). The current Typescript version (2.5.2) supports ES modules emission but uses the js extension by default. It means that to use it with Node, a post-c
Synthesize namespace records on CommonJS imports if necessary · Issue #16093 · microsoft/TypeScript
TL;DR Flags like --allowSyntheticDefaultImports will just work without extra tools like Webpack, Babel, or SystemJS. TypeScript will just work with the --ESModuleInterop flag without extra tools like Webpack, Babel, or SystemJS. See the PR at #19675 for more details. Background TypeScript has successfully delivered ES modules for quite some time now. Unfortunately, the implementation of ES/CommonJ
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[Salsa] Support jsdoc `@namespace` · Issue #14233 · microsoft/TypeScript![[Salsa] Support jsdoc `@namespace` · Issue #14233 · microsoft/TypeScript](https://cdn-ak-scissors.b.st-hatena.com/image/square/9202d730e539dd48832f7148baab97ec9d9ccf69/height=288;version=1;width=512/https%3A%2F%2Fopengraph.githubassets.com%2F7fff0c48972325d55592dd53b92bc5f09db4c1ec73de95b5ed7f8c2e6cc00ecf%2Fmicrosoft%2FTypeScript%2Fissues%2F14233)
Make tuples have known length by KiaraGrouwstra · Pull Request #17765 · microsoft/TypeScript
GitHub - microsoft/TypeScript-Node-Starter: A reference example for TypeScript and Node with a detailed README describing how to use the two together.
GitHub - awslabs/dynamodb-data-mapper-js: A schema-based data mapper for Amazon DynamoDB.
GitHub - microsoft/TypeScript-React-Native-Starter: A starter template for TypeScript and React Native with a detailed README describing how to use the two together.
Mapped conditional types · Issue #12424 · microsoft/TypeScript
Coding guidelines
Numeric separators by weswigham · Pull Request #20324 · microsoft/TypeScript
Release TypeScript 2.6.2 · microsoft/TypeScript
Definite assignment assertions by ahejlsberg · Pull Request #20166 · microsoft/TypeScript
Strict property initialization checks in classes by ahejlsberg · Pull Request #20075 · microsoft/TypeScript
XXX has or is using name 'Foo' from external module "../bar" but cannot be named · Issue #9944 · microsoft/TypeScript
Improved type inference for object literals by ahejlsberg · Pull Request #19513 · microsoft/TypeScript
Synthesize namespace records for proper esm interop by weswigham · Pull Request #19675 · microsoft/TypeScript
