MDN states the following:

some/many error events do not trigger window.onerror, you have to listen for them specifically

That's great, but which ones do not invoke onerror?

MDN states the following:

some/many error events do not trigger window.onerror, you have to listen for them specifically

That's great, but which ones do not invoke onerror?

• javascript
• error-handling

Share Improve this question Follow edited Jan 2, 2022 at 23:58 0Valt 10.4k99 gold badges3939 silver badges6464 bronze badges asked Dec 14, 2012 at 21:22 FranciscFrancisc 80.6k6565 gold badges185185 silver badges278278 bronze badges 3

• 2 If a program cannot be parsed, then you get a SyntaxError before the onerror assignment can even be evaluated. – pimvdb Commented Dec 14, 2012 at 21:27
• Let's assume that the first script loaded only has window.onerror=function(){console.log(arguments);}; and nothing more. – Francisc Commented Dec 14, 2012 at 21:28
• 1 I assume that bit in the MDN docs refers to loading error events for Ajax, images, etc. – apsillers Commented Dec 14, 2012 at 21:32

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It looks like quirksmode has a good detail of what errors it will and will not catch: http://www.quirksmode/dom/events/error.html

If it helps, any error that you specifically throw will be caught.