Trying to create a url to chat that auto fills chat box

Im trying to create a url that auto fill the chat box of a channel to help people to host a channel, i tried to send every variable in the url parameters anyone knows how to do that?
Im trying something like this https://www.twitch/username/popout/chat?textarea=textmessage
I appreciate any kind of tips and help
Thank you

This is not possible for security reasons. And Twitch just doesn’t support it

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