Javascript [js] Code for getting url parameters _ javascript skills

Multiple browsers are compatible with the method of getting url parameters using javascript. We recommend that you use javascript to obtain url parameters on a recent page. You can find that there are so many things on the Internet, there were too many errors. I was dizzy and wasted a lot of time. So, I would like to sum up that it would be easy to use. I would like to declare it first and use regular expressions, which is simple, but the compatibility and speed of multiple browsers are not guaranteed, so I use a multi-browser compatible

The Code is as follows: