Math Plugin For JavaScript Web Framework or Library

KaTeX

KaTeX – The fastest math typesetting library for the web. ... so you can pre-render expressions using Node.js and send them as plain HTML.

Math.js

Math.js is an extensive math library for JavaScript and Node.js. It features big numbers, complex numbers, matrices, units, and a flexible expression 

MathJax

MathJax is a beautiful and accessible math in all browsers. A JavaScript display engine for mathematics that works in all browsers. No more setup for readers.

MathQuill

MathQuill is an open source formula editor for the Web. Easily type math into your webapp.

Numeral.js

A javascript library for formatting and manipulating numbers.

WIRIS

Wiris plugin for enabled math function and typing in HTML. support TinyMCE, CKEditor5, Moodle, etc.

Bibliography:

https://www.mathjax.org
http://www.wiris.com/
https://mathjs.org
https://katex.org
http://mathquill.com
http://numeraljs.com
https://bestofjs.org/projects?tags=math
https://openbase.com/