JSDoc {Object} and {object} shown as any

[mjbvz]

TypeScript Version: 2.5.2

From: microsoft/vscode#34107 (comment)

Code

For the JavaScript

/**
 * @param {Object} x 
 */
function foo(x) { } 

Hover over x.

Expected behavior:
Type of x is shown as Object

Actual behavior:
Type of x is shown as any

[mhegazy]

Cause this is what the type system thinks of them. Object, object and * are all synonymous of any.

Looking at JSDoc patterns in the wild it was clear that:

• Case is used interchangeably, i.e. that object and Object, number and Number, array and Array were used interchangeably.
• Users use Object to mean a plain old JS object or (POJO). in input positions (i.e. function parameters) this means the TS primitive object type, but in output position it rely means any.

So we opted to make Object and object in JSDoc synonymous with any.