Suggestion

Support class member snippet completions in JS files

🔍 Search Terms

class member completion

✅ Viability Checklist

My suggestion meets these guidelines:

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

⭐ Suggestion

We should have class member snippet completions work in JS files. Currently they only work in TS files.

📃 Motivating Example

class Base {
    /**
     * @param {number} a
     * @param {number} b
     */
    foo(a, b) {
        return a + b;
    }
}

class Sub extends Base {
    | // Suggest `foo(a, b) { }` here, like we do in TS files
}

Considerations

To properly support JS, we would have to consider the many ways in which properties can be added to a class in JS. We also should make sure the completion suggestion has JSDoc when possible.