How can I catch JS exceptions from async functions I don't control?

Question

I know using try..catch for async functions doesn't work, and most advice I've read suggests using it inside the passed callback.

However, without control over the async function which throws the exception, what can one do to catch it? In my example it's chrome.bookmarks.create, which fails on some edge cases.

Answer 1

In Chrome extensions, there are two possible ways of catching asynchronous errors:

• Listen to global error events using window.onerror.
• In the callback of asynchronous functions, check the value of chrome.runtime.lastError.

Answer 2

In general cases there's no way to catch exceptions on third party functions, you'll have to use error handling methods provided by someone else.

In case of Chrome's extension API you have the lastError property. Enjoy.