So, I want to check if the pasted url is not 404. Using Javascript. Is there an overrideable function like images_upload_handler?
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Does this answer your question? [detect 404 error on page load](https://stackoverflow.com/questions/26630650/detect-404-error-on-page-load) – Elikill58 Aug 31 '21 at 12:59
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Isn't that too broad? – Jad Sayo Aug 31 '21 at 13:00
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What do you mean ? I think not because you ask to check for all URL, and the linked question check it. After, you just have to well implement this in your form – Elikill58 Aug 31 '21 at 13:01
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xD So, what do you mean with "too broad" ? Why it doesn't correspond to your question – Elikill58 Aug 31 '21 at 13:22
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Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. – Community Sep 03 '21 at 06:31