A JavaScript scripts to coloring the regex pattern.
first import the javascript & css file (you can use jsdelivr, or just download it to your own server).
<link rel="stylesheets" href="https://cdn.jsdelivr.net/gh/suk-ws/regex-colorizer@master/regex-colorizer-default.min.css">
<script src="https://cdn.jsdelivr.net/gh/suk-ws/regex-colorizer@master/regex-colorizer.min.js">
then using the following js code after the page loaded to run coloring :
RegexColorizer.coloringAll();
// this will coloring all the element with class name "regex",
// you can use RegexColorizer.coloringAll("your-own-regex-element-css-class"); to define a different class name.
The coloring idea is from RegExr. So the coloring rule and colors is basicly the same.
not fully the same, for one reason is it seems single
/
error is not such intelligent without js grammar, and the other reason is the regex grammar support is still simple for now.
There's also a test-use page you can see how's the coloring result.