onerror Questions

Javascript: multiple image onerror handlers

January 19, 2024
ccpizza
2 Answers

Looking for ways to set multiple fallbacks for image loading in case the original image source threw an exception. Given an image tag such as <img id="art"> the following JS code sets a fallback image src to album.jpg when the…

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Javascript – Why doesn't the `window.onerror` getter trigger when an uncaught error occurs?

June 15, 2023
Blucas
2 Answers

I want to interceptor the window.onerror which user defined, and get the error parameters info to do some analysis. The following is a part of the interceptor code: const userError = window.onerror; delete window.onerror; const errorFn = (...args) => {…

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