What are the differences between jQuery.when() and

问题:

I learned promises with jQuery and then didn't do much programming for a couple of years. Now I want to do some stuff using native ES6 promises.

Promises bent my head a little back then. Now with both being quite rusty on top of that and there being minor and major differences between jQuery promises, other promise libraries, and the new native JS promises, my head gets even more bent when I try to get this stuff working.

It seems like jQuery.when() and Promise.all() do the same thing, but are there some important differences we should keep in mind?

回答1:

Promise.all() takes Array of Promises or plain JS objects as argument so you need to access results by index.

jQuery.when() takes multiple arguments which are plain JS objects or jQuery Deferred, so you can access your result by variable name.