Weak callback parameters length check in js

TypeScript Version: 4.2.0-dev.20201222

Search Terms: callback parameters length

Code

in .ts everything is ok:

type Test = (a: number, b: number) => number

const a = (func: Test) => func

// OK
const b = a((d, e) => d + e)

// OK: Argument of type '(d: any, e: any, f: any) => any' is not assignable to parameter of type 'Test'
const c = a((d, e, f) => d + e + f)

in .js there's no error if parameters length is wrong:

/** @typedef {(a: number, b: number) => number} Test */

/** @type {(func: Test) => Test} */
const a = func => func

// OK
const b = a((d, e) => d + e)

// Actually: Parameter 'd' implicitly has an 'any' type.
// Expected: Argument of type '(d: any, e: any, f: any) => any' is not assignable to parameter of type 'Test'.
const c = a((d, e, f) => d + e + f)

Expected behavior:
Type checker to show the same error in .js file as in .ts file

Actual behavior:
No errors in .js file

Related Issues:
https://github.com/microsoft/TypeScript/issues/40205