How to encode js UTF-8->windows-1251?

Question

JavaScript

There is an html page in windows-1251 encoding.
I insert the script in utf-8 and there are bugs in the site.
I tried to translate js, but sublime gives out that some characters cannot be recoded.
How can this issue be resolved. How to insert into a file?

Answer 1

<script src="myscripts.js" charset="UTF-8"></script>

Answer 2

Change html encoding to UTF-8. both in the editor and specify<meta charset="utf-8">