Add a function to evaluate_js to run the js before the body and anything

[nelvismyname]

Just make it run before DOM or whatever, basically before the body or anything just as the page is available run it

Basically I am trying to make a discord client and Vencord needs to be ran before the body or anything as it relies on Local Storage which discord removes after the body has loaded.

[r0x0r]

This is tricky, as you must catch a moment when html is loaded, but before the rest of the code.
I am not sure if this is possible with every renderer or at all. Currently evaluate_js is executed roughly after DOMContentLoaded is fired.
Having said that, I will introduce window.run_js function in the next version, which is a stripped down evalless version of evaluate_js. It executes provided script as is and does not return a result. The function is available slightly earlier than evaluate_js, but probably still not early enough. It maybe possible to hook it another navigation event handler to make it available earlier, but I don't know if it is feasible.

[nelvismyname]

Thank you so much! Just do what you can do, it really means a lot to me.

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