How to make the js_javascript trick execute after the page is loaded

javascript is executed only after the page dom model is loaded. javascript
cannot be used
plus defer means it will be executed after the page is completely loaded, which is equivalent to window .onload, but more flexible than window.onload in application

Copy code The code is as follows:

< ;html xmlns=" http://www.w3.org/1999/xhtml">






Read this paragraph first and then execute the above JS. If you remove the defer="defer" above, then JS will be executed first. After seeing this paragraph