sendChat function in character sheet

New to programming and doing some testing. I'm wondering where my error is in my code. Is this function able to be used within the script tag of a character sheet or only in the API console? <script type="text/worker"> on("sheet:opened", function() { sendChat("Character sheet opened"); }); </script> Any help is appreciated. Thanks, Matt

sendChat() is an API function, you can't call it from a text/worker.  Sheetworkers can only manipulate the contents of the character sheet, they don't have a mechanism to send output to the chat.  The best you could do would be to change a big text block on the character sheet, or possibly set an attribute's value that then is output by a roll button that gets pressed separately.

That is what I thought. Thank you for your help!