Simple code for disabling the left and right buttons on a webpage

Simple code for prohibiting the left and right mouse keys on the webpage. This code was previously found online and has a good trial effect. Put it here for backup. I think this is also one of the common code. Of course, you can use the mouse to view the source code. However, sometimes you don't have to think about the complexity and requirements. Besides, the source code contains more code than the text.
Simple code for disabling the left and right buttons on a webpage
[Ctrl + A select all Note: If you need to introduce external Js, You need to refresh it to execute]