ESLint解析并验证JSDoc

Question

Say I have this piece of code:

/** @type {string} */
const foo = '123';
const bar = foo.map((c) => c + 1);

Then I'd like ESLint to tell me I've got an error here: map is not a function of a string type

I use WebStorm as my IDE and it recognizes the issue, but I'd like to be able to recognize these issues using my linter from the command line.

Answer 1

ESLint does not do this, but one can check javascript files, not just typescript files, with Typescript: https://github.com/Microsoft/TypeScript/wiki/Type-Checking-JavaScript-Files

It supports quite a few JSDoc comments: https://github.com/Microsoft/TypeScript/wiki/JsDoc-support-in-JavaScript + it infers types when nothing has been explicitly defined.

Here's the Typescript config of an javascript project of mine: https://github.com/voxpelli/node-promised-retry/blob/67512edc4f414d128279f25268d860d9f10d2be0/tsconfig.json