How are command and commandfor similar to comefrom? They seem similar to goto to me. With goto, the trigger specifies what to do. That's what command and comma

How are command and commandfor similar to comefrom? They seem similar to goto to me. With goto, the trigger specifies what to do. That's what command and commandfor do. With comefrom, what to do specifies the trigger. That seems similar to the existing document.addEventListener() in Javascript.