# Adding support for CSS Custom properties and CSS Grids

**URL:** https://discourse.roots.io/t/adding-support-for-css-custom-properties-and-css-grids/19273
**Category:** sage
**Tags:** webpack
**Created:** 2020-10-07T09:36:03Z
**Posts:** 2

## Post 1 by @dangelion — 2020-10-07T09:36:03Z

Hi  
I’m reading a lot about these 2 modern concepts. Well, I think if working with IE11 in mind they could be ready to be used.

Is Sage 9 ready for them? I mean:

- Autoprefixer 9+ at today makes a lot for CSS Grids ([source](https://css-tricks.com/css-grid-in-ie-css-grid-and-the-new-autoprefixer/))
- For CSS custom properties there are some polyfills ([link](https://github.com/nuxodin/ie11CustomProperties), [link](https://github.com/jhildenbiddle/css-vars-ponyfill)) and this interesting postcss module [postcss-custom-properties](https://www.npmjs.com/package/postcss-custom-properties)

So, what I have to set in Sage 9 to make use of them?

Any advice is appreciated  
Thanks

---

## Post 2 by @dangelion — 2020-10-08T08:26:45Z

Someone could help me to understand how to implement [postcss-custom-properties](https://www.npmjs.com/package/postcss-custom-properties) in Sage 9?

This not worked for me [How to set up Sage with postcss custom properties?](https://discourse.roots.io/t/how-to-set-up-sage-with-postcss-custom-properties/17611)

Thanks