Need help with creating a scriptlet, again

[partingscientist]

I tried writing a scriptlet to click a button whenever it shows up on Twitch.

[snipped]

The above script seemingly runs fine using the developer tools (Firefox 110), but I can't seem to make it work using uBlock Origin (1.47.3b1). Any possible reason(s) as to why? Thank you in advance.

[liamengland1]

uBO scriptlets cannot trigger any DOM events, such functionality is not implemented for security reasons. #2229

[uBlock-user]

Nothing to do with uBO scriptlets, these scriptlets are no different that a plain javascript and that feature request is completely irrelevant here.

[uBlock-user]

replace document.querySelector(".chat-input__buttons-container") with document.documentElement and try again.

You also need to add a filter - - twitch.tv##+js(twitch-claim-bonus) in my filters.

[partingscientist]

I think I figured it out.

I realised that uBO probably want to inject scriptlets as soon as possible to a given page. This probably means that when the above scriptlet is executed, document.querySelector(".chat-input__buttons-container") probably returns null because the DOM node has not been loaded yet.

To fix this, I first observe the document on whether the .chat-input__buttons-container node that I'm looking for exists. Then, I disconnect that observer and reattach a new one on the node I'm targeting.

While exploring this, I also noticed that scriptlets seem to cannot have a blank line in it. I failed to find that being documented anywhere so might as well let any future reader know.

Thank you for the help!

[uBlock-user]

While exploring this, I also noticed that scriptlets seem to cannot have a blank line in it. I failed to find that being documented anywhere so might as well let any future reader know.

Can you elaborate on this with an example ?

[mapx-]

https://forums.informaction.com/viewtopic.php?p=100840&sid=4bb87344e011911c33c5f39f91b2e99d#p100840

(gorhill)
Avoid blank lines inside the scriptlet code, it's used to signal end-of-scriplet. 
I use two blank lines in uBO's code just to better visually separate scriptlets.