components/sass/init/_mixins.scss

@mixin between {
  display: flex;
  justify-content: space-between;
}

@mixin breakpoint-max($breakpoint) {
  @media (max-width: #{$breakpoint}px) {
    @content;
  }
}

@mixin breakpoint-min($breakpoint) {
  @media (min-width: #{$breakpoint}px) {
    @content;
  }
}

@mixin center {
  align-items: center;
  display: inline-flex;
  justify-content: center;
}

@mixin clearfix {
  clear: both;
  content: "";
  display: block;
}

// (Smart) text truncation
// Pass in a width to customize how much text is allowed
// Omit value for basic text truncation
@mixin constrict($value: null) {
  @if ($value) {
    max-width: $value;
  }

  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@mixin create-grid($items-per-row: 4) {
  grid-template: repeat(1, 1fr) / repeat($items-per-row, 1fr);
}

// Smart font include
// Simply pass in the font-weight you want to use and the normal/italicized versions will be added
// No more weighing down the front-end with references to unused weights
@mixin font-face($font-weight, $relative-font-path, $font-name) {
  @font-face {
    font-family: $font-name;
    font-style: normal;
    font-weight: $font-weight;
    // sass-lint:disable indentation
    src: url("#{$relative-font-path}/#{$font-weight}.woff2") format("woff2"),
      url("#{$relative-font-path}/#{$font-weight}.woff") format("woff");
    // sass-lint:enable indentation
  }

  @font-face {
    font-family: $font-name;
    font-style: italic;
    font-weight: $font-weight;
    // sass-lint:disable indentation
    src: url("#{$relative-font-path}/#{$font-weight}i.woff2") format("woff2"),
      url("#{$relative-font-path}/#{$font-weight}i.woff") format("woff");
    // sass-lint:enable indentation
  }
}

@mixin font-mono {
  font-family: "Fira Code", "Courier New", monospace;
}

@mixin font-sans {
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
    "Segoe UI Symbol";
}

@mixin font-serif {
  font-family: Georgia, serif;
}

@mixin hide-text {
  border: none;
  color: transparent;
  font: 0 / 0 a;
  text-shadow: none;
}

// Cross-browser line-clamp support
@mixin line-clamp(
  $element-height: 2rem,
  $row-count: 2,
  $fade-color: var(--lbry-white),
  $computed-position: relative
) {
  height: $element-height;
  overflow: hidden;
  position: $computed-position;

  &::after {
    width: 50%;
    height: calc(#{$element-height} / #{$row-count});
    right: 0;
    bottom: 0;

    background-image: linear-gradient(
      to right,
      rgba($lbry-white, 0),
      #{$fade-color} 80%
    );
    content: "";
    position: absolute;
  }
}

@mixin no-user-select {
  user-select: none;

  -ms-user-select: none;
  -moz-user-select: none;
  -webkit-user-select: none;
}

// TODO: Make customizable
// The `background-position` in `loading-animation` is the same width as this `background-size`
// The same values can be passed to both
@mixin placeholder {
  animation-duration: 4s;
  animation-fill-mode: forwards;
  animation-iteration-count: infinite;
  animation-name: loading-animation;
  animation-timing-function: linear;
  background-color: transparent;
  background-image: linear-gradient(
    to right,
    var(--color-gray-3) 10%,
    transparent 80%,
    var(--color-gray-3) 100%
  );
  background-repeat: repeat;
  background-size: 500px;

  [data-mode="dark"] & {
    background-image: linear-gradient(
      to right,
      rgba($lbry-white, 0.1) 10%,
      transparent 80%,
      rgba($lbry-white, 0.1) 100%
    );
  }
}

// Use CSS variables without upsetting Sass-Lint
// https://github.com/sasstools/sass-lint/issues/1161#issuecomment-390537190
@mixin root-prop($prop: null, $value: null) {
  @if ($prop and $value) {
    #{$prop}: $value;
  }
}

@mixin selection(
  $background-color: var(--lbry-white),
  $text-color: var(--lbry-black)
) {
  &::selection {
    background-color: $background-color;
    color: $text-color;
    text-shadow: none;
  }

  &::-moz-selection {
    background-color: $background-color;
    color: $text-color;
    text-shadow: none;
  }
}

@mixin thumbnail {
  &::before,
  &::after {
    content: "";
  }

  &::before {
    float: left;
    padding-top: var(--aspect-ratio-standard);
  }

  &::after {
    clear: both;
    display: block;
  }
}

@mixin focus {
  box-shadow: 0 0 0 3px var(--color-focus);
}

@mixin underline(
  $text-color: var(--lbry-black),
  $whitespace-color: var(--lbry-white)
) {
  @include selection($text-color, $whitespace-color);

  background-image: linear-gradient($whitespace-color, $whitespace-color),
    linear-gradient($whitespace-color, $whitespace-color),
    linear-gradient($text-color, $text-color);
  background-position: 0 88%, 100% 88%, 0 88%;
  background-repeat: no-repeat, no-repeat, repeat-x;
  background-size: 0.05rem 1px, 0.05rem 1px, 1px 1px;
  box-decoration-break: clone;
  display: inline;
  text-decoration: none;
  text-shadow: 0.03rem 0 $whitespace-color, -0.03rem 0 $whitespace-color,
    0 0.03rem $whitespace-color, 0 -0.03rem $whitespace-color,
    0.06rem 0 $whitespace-color, -0.06rem 0 $whitespace-color,
    0.09rem 0 $whitespace-color, -0.09rem 0 $whitespace-color,
    0.12rem 0 $whitespace-color, -0.12rem 0 $whitespace-color,
    0.15rem 0 $whitespace-color, -0.15rem 0 $whitespace-color;

  @-moz-document url-prefix() {
    // sass-lint:disable-line empty-args
    background-position: 0 90%, 100% 90%, 0 90%;
  }
}