CSS custom properties polyfill for ie11
Is there a way to pollyfill a custom CSS property for ie11 with JavaScript? I was thinking on load, check if browser supports custom properties and if not do some kind of find and replace on the properties.
Is this possible with JavaScript or some library?
Thanks
Answer
Have a look at this (my) Custom-Properties-Polyfill:
https://github.com/nuxodin/ie11CustomProperties
How it works
The script makes use of the fact that IE has minimal custom properties support where properties can be defined and read out with the cascade in mind.
.myEl {-ie-test:'aaa'} // only one dash allowed "-"
then read it in javascript:
getComputedStyle( querySelector('.myEl') )['-ie-test']
From the README:
Features
- handles dynamic added html-content
- handles dynamic added , -elements
- chaining
--bar:var(--foo)- fallback
var(--color, blue)- :focus, :target, :hover
- js-integration:
style.setProperty('--x','y')style.getPropertyValue('--x')getComputedStyle(el).getPropertyValue('--inherited')- Inline styles:
<div ie-style="--color:blue"...- cascade works
- inheritance works
- under 3k (min+gzip) and dependency-free