How do I use promises in a Chrome extension?

Question

What I am trying to do is create a chrome extension that creates new, nested, bookmark folders, using promises.

The function to do this is chrome.bookmarks.creat

Answer 1

Take the advantage of the convention that the callback function always be the last argument, I use a simple helper function to promisify the chrome API:

function toPromise(api) {
  return (...args) => {
    return new Promise((resolve) => {
      api(...args, resolve);
    });
  };
}

and use it like:

toPromise(chrome.bookmarks.create)(bookmark).then(...);

In my use case, it just works most of the time.