Note: if you are looking for a guide for the Web Platform Test, you should read "Web platform tests" (WPT). This document does not cover WPT specific features/behaviors. The WPT is recommended today ...

Suppose you have some source code. You want to make some light modifications to it - replacing a few characters here and there, wrapping it with a header and footer, etc - and ideally you'd like to ...

A vanilla JS cleaner that strips invisible Unicode and odd spaces from pasted text without breaking emoji ZWJ sequences.