JsDocy helps you to generate comments for JsDoc. You can use this like the followings:
:JsDocyAddJsDoc
For example, if the cursor is placed on the first line of the following code
and you execute :JsDocyAddJsDoc
,
function foo(bar, baz, qux) {
// some code
}
then you get the result as below.
/**
* @param {} bar
* @param {} baz
* @param {} qux
* @return {}
*/
function foo(bar, baz, qux) {
// some code
}