`Parameters` does not copy function description message.

[jespertheend]

Bug Report

🔎 Search Terms

parameters jsdoc description message

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about parameters

⏯ Playground Link

Playground link with relevant code

💻 Code

/**
 * A function that returns the number you pass to it.
 */
function myCoolFunction(x : number) {}

function basicallyTheSameFunction(...args : Parameters<typeof myCoolFunction>) {}

Then hover over basicallyTheSameFunction.

🙁 Actual behavior

The function does not have a description, whereas myCoolFunction does.

🙂 Expected behavior

The basicallyTheSameFunction would have the same description as myCoolFunction.

📃 Motivating Example

I'm not familiar with the inner workings of TypeScript, so in case this is more of a feature request rather than a bug report, please consider the following use case: playground link
When working with jsdoc only, I think the cleanest way of supporting overloaded functions for Intellisense is like this:

/**
 * This function takes a number and a string.
 * @param {number} num
 * @param {string} str
 */
function signatureA(num, str) {}

/**
 * This function takes a boolean and an object
 * @param {boolean} bool
 * @param {Object} obj
 */
function signatureB(bool, obj) {}

/**
 * @param {Parameters<typeof signatureA> | Parameters<typeof signatureB>} args
 */
function overloaded(...args) {}

Then when typing overloaded(), the parameter suggestions window will show all the possible signatures, but unfortunately descriptions are not copied this way.

[andrewbranch]

I think it would be super unexpected if this happened. The parameters of some function do not fully represent the function declaration.

[jespertheend]

Is there any other way to transfer a function description like this that I'm not aware of? I'd really like to be able to autocomplete/document overloaded functions with pure js.