Code parsing of the application instance in the JS extension prompt box, and js application instance

Code parsing of the application instance in the JS extension prompt box, and js application instance

If you don't talk much about it, paste the Code directly. The specific code is as follows:

<! DOCTYPE html> 
Note the notes that need to be noted when writing the delayed prompt box. Note the notes one by one. After reading the video tutorial, this function is smooth, the reason is that a list of required functions is implemented one by one according to the list before writing the code. If there is a problem, it is much better to adjust the corresponding functions than to write the code directly.