E[att^="val"] { sRules }
例如：
<style>
div[class^="a"] {
border: 2px solid #000;
}
</style>
<div id="qg1vjhaigs" class="abc">1</div>
<div id="qg1vjhaigs" class="acb">2</div>
<div id="qg1vjhaigs" class="bac">3</div> 此例，將會(huì)命中1, 2兩個(gè)div，因?yàn)槠ヅ涞搅薱lass屬性，且屬性值以a開(kāi)頭
| IE | Firefox | Chrome | Safari | Opera | iOS Safari | Android Browser | Android Chrome |
|---|---|---|---|---|---|---|---|
| 6.0 | 2.0+ | 4.0+ | 3.1+ | 3.5+ | 3.2+ | 2.1+ | 18.0+ |
| 7.0+ |