This plugin allows you to add a variety of corners to objects without using images while still having the outside of the corner as transparent (as opposed to using the color of the objects behind it, like most other javascript corner techniques).
CSS中 background 是一个很基本的而且比较常用的样式 background : background-color || background-image || background-repeat || background-attachment || background-size || background-clip || background-position 这个是 bac
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