How to handle exceptions in JS _ javascript skills

During js writing, we will inevitably encounter some code errors and need to find them out. Sometimes, we are afraid that the user experience may be poor due to js problems. Here are some solutions for js Fault-Tolerant statements, that is, js errors do not prompt errors (prevent the browser from having a yellow triangle symbol in the lower right corner, or the user experience is poor)

The Code is as follows:

Window. onerror = function () {return true ;}

The following is an example of how to retrieve js exception information for developers.

1, try... catch...

The Code is as follows: