Why does layout go wrong when using gulp-minify-css in ie9?

Question

css

In other browsers it's fine.
If you do not use this plugin, but simply compress css by removing spaces and line breaks, then it is also normal, only the compression is not as cool as that of gulp-minify-css
UPD: I ran the
source and the minified version with one beautifier - in the source for 1000 lines more! How so? ie8 in plugin support enabled

Answer 1

gulp-minify-css uses clean-css
clean-css has ie7 support modes, ie8 try enabling them.
Perhaps this is a bug, look in issue clean-css or parse the compressed file and see what was removed.