A robust polyfill for the
CSS.escape utility method as defined in CSSOM.
For a more powerful alternative, consider using cssesc, which automatically takes care of excessive whitespace, and has many options to customize the output.
In a browser:
npm install css.escape
Then, in Node.js:
;// On Windows and on Mac systems with default settings, case doesn’t matter,// which allows you to do this instead:;
This polyfill is available under the MIT license.