gradient color value will be optimized in the filter

[chengwb53]

Precheck

• Do a quick search and make sure a bug has not yet been reported;
• do a quick check if the bug still exists in the latest patch version;
• finally, be nice and have fun!

Environment

• clean-css version - npm ls clean-css:
• node.js version - node -v:
• operating system:

Configuration options

var CleanCSS = require('clean-css');
new CleanCSS({
   compatibility: 'ie7'
})

Input CSS

/* the shorter the better! */
filter:progid:DXImageTransform.Microsoft.gradient(gradientType=0, startColorstr=#66000000, endColorstr=#66000000)}

Actual output CSS

filter:progid:DXImageTransform.Microsoft.gradient(gradientType=0, startColorstr=#60000, endColorstr=#60000)}

Expected output CSS

filter:progid:DXImageTransform.Microsoft.gradient(gradientType=0, startColorstr=#66000000, endColorstr=#66000000)}

[chengwb53]

but we can resolve it use this options:
new CleanCSS({
compatibility: 'ie7,-properties.colors'
})

[jakubpawlowicz]

@chengwubin this is odd indeed - what's the 8-value hex? Is it #RRGGBBAA (a for alpha)?

[jakubpawlowicz]

Fixed in 4.1.5.