Js and alert solutions to garbled characters _ javascript skills

Js and alert solutions to garbled code problems. If you need a friend, you can refer to the js files that can be normally used the past few days. After adding something, the alert () the pop-up prompt box is always garbled with Chinese characters. I read a lot on the Internet, and the answer is basically Or change gb2312 to UTF-8. I have tested multiple methods for a long time and still cannot solve this problem.

Solution:
Finally, I found something in a corner of a Forum. I used to specify the encoding method of character sets when referencing js files in html.