can’t find java script in my browser

JavaScript is enabled by default.

In Safari on Mac, see Settings (Preferences in previous versions)﹥Security﹥Web content: ☑ Enable JavaScript

Else, on what device did you wish to enable JS?

In addition to the above which-device question…

… Which version?

… If you are encountering an error message with Safari or with some website, what is it?

… Is this happening with one website, or with many websites?