了解Vscode中的Intellisense

Question

I am new to nodejs and started using vscode recently but pretty good with Javascript and its wonderful features. I am having some trouble understanding the parameters that the intellisense is showing.

What exactly does this line mean, this intellisense is so confusing!. Is there some extension that I can install which will give the boiler plate code if I want to use for eg: watch method.

Thanks and please dont down vote, this is a genuine question as to how to make sense of the intellisence.

Thanks

Answer 1

listener?: (event: string, filename: string) => any

From left to right:

• fs.watch accepts an optional argument listener (the ? indicates this)
• listener should be a function accepting two parameters: event and filename . (Technically you could write a function that doesn't accept any, but you'd lose information)
• listener doesn't need to return anything ( => any )

There's more information here , including how VS Code actually generates this annotations.