Trying to compress <style type="text/css"></style> the attribute type="text/css" should be removed, since it is the default value

The styleTypeAttrPattern matches (and the compressor later remove) type="text/style" , but the common value is "text/css". https://developer.mozilla.org/en-US/docs/Web/HTML/Element/style#Attributes

I'd suggest to match and remove both.