This article is just for the record, not absolute.
1. Be sure to use Google browser, and then open the developer tool, in the sources (sources), directly select the top folder and right-click to search, and the search keyword is the encrypted field 2. Slowly
debug
3. Through the function search bound on the button, directly open the developer tool, and then select the button on the page, you can see the encryption function similar to the onclick() event binding 4. Event Listeners positioning method, F12 to open the
developer Tools, then use the selection arrow to select the target tab, and finally open the Developer Tools Event Listeners panel. The event corresponding to the label will be displayed.