$fontSizes: (
"smaller": 0.75,
"small": 0.875,
"regular": 1,
"large": 1.25,
"larger": 2,
);
// Maps a named font-size to its em equivalent.
@mixin font-size($sizeName) {
font-size: map-get($fontSizes, $sizeName) * 1em;
}
@keyframes loading-fade {
0% {
opacity: 0.7;
}
50% {
opacity: 1;
}
100% {
opacity: 0.7;
}
}
// Adds animation to placeholder section
@mixin placeholder() {
animation: loading-fade 1.2s ease-in-out infinite;
background-color: $placeholder-color !important;
color: $placeholder-color !important;
outline: 0 !important;
border: 0 !important;
box-shadow: none;
pointer-events: none;
max-width: 100%;
// Forces direct descendants to keep layout but lose visibility.
> * {
visibility: hidden;
}
@media screen and (prefers-reduced-motion: reduce) {
animation: none;
}
}
@mixin force-content() {
&::after {
content: "\00a0";
}
}
// Hide an element from sighted users, but available to screen reader users.
@mixin visually-hidden() {
border: 0;
clip: rect(1px, 1px, 1px, 1px);
clip-path: inset(50%);
height: 1px;
width: 1px;
margin: -1px;
overflow: hidden;
/* Many screen reader and browser combinations announce broken words as they would appear visually. */
overflow-wrap: normal !important;
word-wrap: normal !important;
padding: 0;
position: absolute !important;
width: 1px;
}
@mixin visually-hidden-focus-reveal() {
background-color: #fff;
border-radius: 3px;
box-shadow: 0 0 2px 2px rgba(0, 0, 0, 0.6);
clip: auto !important;
clip-path: none;
color: $input-text-active;
display: block;
font-size: 0.875rem;
font-weight: 700;
height: auto;
left: 5px;
line-height: normal;
padding: 15px 23px 14px;
text-decoration: none;
top: 5px;
width: auto;
z-index: 100000;
}
@mixin reset-box() {
border: 0;
border-radius: 0;
margin: 0;
padding: 0;
vertical-align: baseline;
}
@mixin reset-typography() {
color: inherit;
font-family: inherit;
font-size: inherit;
font-style: inherit;
font-weight: inherit;
letter-spacing: inherit;
line-height: inherit;
text-decoration: inherit;
text-transform: inherit;
}
// Reset <h1>, <h2>, etc. styles as if they were text. Useful for elements that must be headings for a11y but don't need those styles.
@mixin text-heading() {
@include reset-box();
@include reset-typography();
box-shadow: none;
display: inline;
background: transparent;
}
// Reset <button> style as if it was text. Useful for elements that must be `<button>` for a11y but don't need those styles.
@mixin text-button() {
@include reset-box();
@include reset-typography();
background: transparent;
box-shadow: none;
display: inline;
text-shadow: none;
&:hover,
&:focus,
&:active {
background: transparent;
}
}
// Reset <button> style so we can use link style for action buttons.
@mixin link-button() {
@include text-button();
text-decoration: underline;
}
// Makes sure long words are broken if they overflow the container.
@mixin wrap-break-word() {
// This is the current standard, works in most browsers.
overflow-wrap: anywhere;
// Safari supports word-break.
word-break: break-word;
// IE11 doesn't support overflow-wrap neither word-break: break-word, so we fallback to -ms-work-break: break-all.
-ms-word-break: break-all;
}
// Shows a border with the current color and a custom opacity. That can't be achieved
// with normal border because `currentColor` doesn't allow tweaking the opacity, and
// setting the opacity of the entire element would change the children's opacity too.
@mixin with-translucent-border($border-width: 1px, $opacity: 0.3) {
position: relative;
&::after {
border-style: solid;
border-width: $border-width;
bottom: 0;
content: "";
display: block;
left: 0;
opacity: $opacity;
pointer-events: none;
position: absolute;
right: 0;
top: 0;
}
}
// Wraps the content with a media query specially targeting IE11.
@mixin ie11() {
@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
@content;
}
}
// Converts a px unit to em.
@function em($size, $base: 16px) {
@return $size / $base * 1em;
}
// Encodes hex colors so they can be used in URL content.
@function encode-color($color) {
@if type-of($color) != "color" or str-index(#{$color}, "#") != 1 {
@return $color;
}
$hex: str-slice(ie-hex-str($color), 4);
@return "%23" + unquote("#{$hex}");
}