js method to expand the web page window from the middle up and down_javascript skills

The example in this article describes the method of using js to expand the web page window from the middle up and down. Share it with everyone for your reference. The specific analysis is as follows:

This is the page display effect that starts from the middle and then slowly expands up and down. It is not bad. The code is as follows:

Copy code The code is as follows:

I hope this article will be helpful to everyone’s Go language programming.