Detailed analysis of the execution sequence of onclick and listeners_javascript skills

The following code will first execute onclick and then execute event monitoring:

Copy the code The code is as follows:

div1's native fireEvent runs onclick first and then listeners

The execution order of JQuery is exactly the opposite:

Copy code The code is as follows:

< ;style>
div{border:1px solid balck;padding:5px;margin:2px;}



< ;div id="div2" onclick="alert(2);" >div2 JQuery, run listeners first, then onclick

I scanned the implementation of jq's trigger and didn't understand it. What is the purpose of inversion.