https://github.com/mattn/go-ieproxy
----------------------------------------------------------------
MIT License

Copyright (c) 2014 mattn
Copyright (c) 2017 oliverpool
Copyright (c) 2019 Adele Reed

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal

_rfs-enable-class {\n  @if $rfs-class == \"enable\" {\n    .enable-responsive-font-size &,\n    &.enable-responsive-font-size {\n      @content;\n    }\n  }\n  @else {\n    @content;\n  }\n}\n\n// Internal mixin used to determine which media query needs to be used\n@mixin _rfs-media-query($mq-value) {\n  @if $rfs-two-dimensional {\n    @media (max-width: #{$mq-value}), (max-height: #{$mq-value}) {\n      @content;\n    }\n  }\n  @else {\n    @media (max-width: #{$mq-value}) {\n      @content;\n  ...