Code to make IE support RGBa background color_javascript skills
Above code:
[Ctrl A Select all Note: If you need to introduce external Js, you need to refresh to execute ]
DXImageTransform.Microsoft.gradient filter The startColorstr parameter value in the mirror is in the form of #AARRGGBB, where AA is hexadecimal representing opacity, 00 means completely transparent, FF means fully opaque, the decimal range is 0~255, and the remaining RRGGBB is the color hexadecimal code. In the example, background: rgba(125, 0, 0, .3); represents a red background with 30% opacity. How to convert 30% opacity to hexadecimal? It's very simple. First calculate the decimal x of #AA, x/255 = 3/10, and the solution is x=3*255/10, and then convert x to hexadecimal, which is approximately equal to 4B.
Attached below are the pictures used in the examples: 
Author: Zhou Mingzhi
Part of the article comes from: RGBa Browser Support
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