[GitHub] incubator-weex-site pull request #126: Update css-units.md

[erha19 <gi...@git.apache.org>]

Github user erha19 commented on a diff in the pull request:

    https://github.com/apache/incubator-weex-site/pull/126#discussion_r180957969
  
    --- Diff: source/wiki/css-units.md ---
    @@ -8,4 +8,50 @@ version: 2.1
     
     <!-- toc -->
     
    -Work in progresss.
    +## CSS `color` units
    +
    +```css
    +.classA {
    +  /* 3-chars hex */
    +  color: #0f0;
    +  /* 6-chars hex */
    +  color: #00ff00;
    +  /* rgba */
    +  color: rgb(255, 0, 0);
    +  /* rgba */
    +  color: rgba(255, 0, 0, 0.5);
    +  /* transparent */
    +  color: transparent;
    +  /* Basic color keywords */
    +  color: orange;
    +  /* Extended color keywords */
    +  color: darkgray;
    +}
    +```
    +
    +## Notes
    +
    +* Not support `hsl()`, `hsla()`, `currentColor`, or 8-character hexadecimal color.
    +
    +* Performance of `rgb(a,b,c)` or `rgba(a,b,c,d)` is much worse than other color formats, please select the appropriate color format.
    +
    +build-in color name you can see [Color Names](./color-names.html).
    +
    +## CSS `length` units
    +
    +In weex we only support `px` length units., and it will resolve to a numeric type in the JavaScript runtime and native renderer.
    --- End diff --
    
    Thank you for your review, I will fix it.


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