and jquery is connected, Yes ?
you have #savetradeBtn in jquery and a button called #savetrade
lily.Kozey answered on July 8th 19 at 12:08
Usually the "not working" has symptoms,
what gives the error console?
spell your console.log("321"); or it does not reach?
where a piece of code before the call and after the call? Here never comes for some if?
Before and after handler add console.log("start"); console.log("end"); will at least clear code comes here or not.
mazie.Towne answered on July 8th 19 at 12:10
Where and how add the item and where you have the script? Perhaps you are confusing the background script and content script, or just add the item so that no time to line up the DOM.