css-vars-ponyfill (npm): Client-side support for CSS custom properties (aka "CSS variables") in legacy and modern browsers
Keywords: client|component|css|custom properties|custom property|custom|dom|es6|ie|ie9|ie10|ie11|internet explorer|javascript|js|legacy|module|mutation|observer|polyfill|ponyfill|properties|property|runtime|shadow|variables|vars|watch|web|client-side|custom-properties|custom-property|internet-explorer|shadow-dom|web-component