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.

Beginne mit der Diagnose TS8010 und der Option allowJs in tsconfig.json und verfolge dann, wie tsc Typannotationen in .js-Dateien meldet. Die Aufgabe ist abgeschlossen, wenn eine Konfiguration diese Diagnose deaktivieren kann, ohne das Verhalten des erzeugten JavaScript zu ändern.