Property assignment in constructor with JSDoc @param wrongly reports type as any

[gthb]

Type: Bug

In this code:

class Foo {
  /** @param {number} bar */
  constructor (bar) {
    this.bar = bar;
  }
}

const foo = new Foo(37);
console.log(foo.bar);

the type of property bar is inferred from the parameter type via the constructor assignment, as verified by:

• VS Code showing (property) Foo.bar: number when I hover on foo.bar in the last line
• tsc --noImplicitAny making no complaints

but VS Code shows (property) Foo.bar: any when I hover on this.bar in the constructor.

I think that's simply a bug — at least I can't think of a reason it ought to be that way, and it has misled me into spending time troubleshooting inference or explicitly declaring the type.

Seen originally in latest stable VS Code and now also in VS Code Insiders with no extensions.

VS Code version: Code - Insiders 1.97.0-insider (Universal) (3d0aeb47a2ecfde9ff5141470b30c36d41c321d9, 2025-01-20T05:04:25.114Z)
OS version: Darwin arm64 24.2.0
Modes:

System Info

Item	Value
CPUs	Apple M1 Pro (10 x 2400)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	7, 6, 5
Memory (System)	32.00GB (0.72GB free)
Process Argv
Screen Reader	no
VM	0%

Extensions: none

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