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akaihola avatar akaihola commented on June 8, 2024 1

I asked ChatGPT

Why does changing // @run-at document-start to // @run-at document-end fix a ViolentMonkey script and get rid of the document.head is null error?

and got the answer:

The @run-at metadata block in a ViolentMonkey script specifies when the script should be executed. If the script is set to run at document-start, it will be executed as soon as possible, before the document's content (including the <head> element) has been loaded. This can cause problems if the script tries to access or modify the <head> element, because it won't exist yet.

On the other hand, if the @run-at metadata is set to document-end, the script will be executed after the document's content (including the <head> element) has been loaded. This allows the script to safely access and modify the <head> element, because it will exist by the time the script runs.

In summary, changing the @run-at metadata from document-start to document-end can fix the document.head is null error because it ensures that the script is executed after the <head> element has been loaded, so that the script can safely access and modify it.

A similar explanation is provided in greasemonkey/greasemonkey#2515.

from chatgpt-exporter.

akaihola avatar akaihola commented on June 8, 2024

Replacing

// @run-at       document-start

with

// @run-at       document-end

seems to fix the issue.

from chatgpt-exporter.

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