Ability to disable TS8010: 'types' can only be used in a .ts file.

Search Terms

TS8010
TS 8010
types can only be used in a .ts file
'types' can only be used in a .ts file

Suggestion

Ability to disable TS8010: 'types' can only be used in a .ts file. Type annotations could simply be ignore by tsc when compiling a .js file.

Use Cases

I work in a JS / TS blended codebase. My team uses WebStorm as our IDE, and it supports type annotations in .js files. When a variable/param is typed, it provides type-specific autocompletion. As you can imagine, that's quite powerful when working in a JS environment. Consequently, we have thousands of type annotations throughout our JS files. We would like to add allowJs:true to our tsconfig.json, however tsc throws an error for every type annotation in each JS file.

Checklist

My suggestion meets these guidelines:

• [ x ] This wouldn't be a breaking change in existing TypeScript/JavaScript code
• [ x ] This wouldn't change the runtime behavior of existing JavaScript code
• [ x ] This could be implemented without emitting different JS based on the types of the expressions
• [ x ] This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, etc.)
• [ x ] This feature would agree with the rest of TypeScript's Design Goals.

まず tsconfig.json の TS8010 診断と allowJs オプションから始め、次に tsc が .js ファイル内の型注釈をどのように報告するかを追跡します。設定によってこの診断を無効化でき、生成される JavaScript の動作を変更しないことが完了の条件です。