Intellisense when specifying object properties

[Bibliofile]

• VSCode Version: Code 1.18.1 (929bacb, 2017-11-16T18:32:36.023Z)
• OS Version: Windows_NT x64 10.0.16299
• Extensions: Extensions are disabled

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Steps to Reproduce:

1. Create a new .ts file with the following code (Copied from Typescript/17352)

/**
 * @param {object} o - has a string and a number
 * @param {string} o.s - the string
 * @param {number} o.n - the number
 */
function f(o) { return o.s.length + o.n; }

2. Start typing to call the function

I would expect the comment the string to show up when modifying the s property, however - the number is always shown.

Using Typescript types does not fix this issue (and is my primary concern):

/**
 * @param o - has a string and a number
 * @param o.s - the string
 * @param o.n - the number
 */
function f(o: {s: string; n: number }) { return o.s.length + o.n; }

Related: Typescript/11597

[mjbvz]

In your example under 2, I believe the key should be s, not o

[Bibliofile]

You are correct, however fixing that does not resolve my problem unfortunately. (Though at least I'm getting the comment for o now)

[mjbvz]

Do you still see this in the latest vscode insiders build?

[Bibliofile]

Whatever has changed has improved this quite a lot! I now see @param with the comments when typing out the function call, which is very useful.

However, it still isn't perfect.

Using

/**
 * @param a first
 * @param b second
 */
function g(a: number, b: number) { return a * b; }

When typing, depending on what argument I am typing VSCode will show "first" or "second" as expected. However with the original code, I will always see the comment for o - never for o.s or o.n.

Since they are available under the @param list below the first comment, this isn't a big deal, but it would be nice if the first comment changed as well.

[mjbvz]

Yes that sounds like microsoft/TypeScript#22350

We'll keep investigating this on the TS side. Closing as upstream