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Update _screen-reader.scss (#22154)

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* Update _screen-reader.scss

Small improvements that could be important:
* `clip` [is deprecated](https://www.w3.org/TR/css-masking-1/#clip-property). Adding `clip-path` as progressive enhancement; the shorter notation came from @ryuran 's [suggestion](https://twitter.com/ryuran78/status/778943389819604992);
* [J. Renée Beach warned about single pixel with interfering with screen readers vocalisation](https://medium.com/@jessebeach/beware-smushed-off-screen-accessible-text-5952a4c2cbfe#.vcd5xlpgg) solved with `white-space`.

See [the detailed post on Hugo Giraudel's blog](http://hugogiraudel.com/2016/10/13/css-hide-and-seek/).

Also kinda related to issue #20732 :)

Please let me know if you find any trouble with this technique. Thanks a lot!

* Reorder declarations

To pass Hound.
Didn't think `clip` and `clip-path` would be considered as unrelated…

* Trailing spaces

* Last trailing space?

* Remove margin: -1px
This commit is contained in:
Gaël Poupard 2017-03-20 00:05:45 +01:00 committed by Mark Otto
parent caebfcd246
commit 2085c14267
1 changed files with 5 additions and 2 deletions
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7
scss/mixins/_screen-reader.scss
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@ -1,15 +1,17 @@
// Only display content to screen readers
//
// See: http://a11yproject.com/posts/how-to-hide-content
// See: http://hugogiraudel.com/2016/10/13/css-hide-and-seek/
@mixin sr-only {
position: absolute;
width: 1px;
height: 1px;
padding: 0;
margin: -1px;
overflow: hidden;
clip: rect(0,0,0,0);
white-space: nowrap;
clip-path: inset(50%);
border: 0;
}
@ -25,8 +27,9 @@
position: static;
width: auto;
height: auto;
margin: 0;
overflow: visible;
clip: auto;
white-space: normal;
clip-path: none;
}
}