css background-size htc无效的几种情况

使用了兼容ie8的background-size htc,如果是display:block的元素,它的背景显示是没问题的,但是如果这个元素display:none,则背景不显示,或者,这个元素是个伪元素,也不显示,迫于赶工期,不使用背景了,直接增加一个图片元素,一切都ok了

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