No-Library (pure JS), HTML, CSS, JavaScript
See: https://stackoverflow.com/a/54014428/1762224
https://stackoverflow.com/questions/62694930/
Tutorial: https://dev.to/phoinixi/two-way-data-binding-in-vanilla-js-poc-4e06
Sample Mocha with Chai example for jsfiddle
jQuery Compat (edge), HTML, CSS, JavaScript