@mixin width-fit-content($widthType: “width”) {

#{$widthType}: fit-content;
#{$widthType}: -moz-fit-content;

}

@mixin transition($str) {

-webkit-transition: #{$str};
-moz-transition: #{$str};
-ms-transition: #{$str};
-o-transition: #{$str};
transition: #{$str};

}