sass

responsive media

原文来自：snippets.barretlee.com，只是为了自己学习收集特意fork了一遍。如有侵权，联系删除：i@webcliwn.net。

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$breakpoints: (
  'small':  767px,
  'medium': 992px,
  'large':  1200px
) !default;

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/// Mixin to manage responsive breakpoints
/// @author Hugo Giraudel
/// @param {String} $breakpoint - Breakpoint name
/// @require $breakpoints
@mixin respond-to($breakpoint) {
  // If the key exists in the map
  @if map-has-key($breakpoints, $breakpoint) {
    // Prints a media query based on the value
    @media (min-width: map-get($breakpoints, $breakpoint)) {
      @content;
    }
  }

  // If the key doesn't exist in the map
  @else {
    @warn "Unfortunately, no value could be retrieved from `#{$breakpoint}`. "
        + "Available breakpoints are: #{map-keys($breakpoints)}.";
  }
}

使用：

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.selector {
  color: red;

  @include respond-to('small') {
    color: blue;
  }
}

结果：

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.selector {
  color: red;
}
@media (min-width: 767px) {
  .selector {
    color: blue;
  }
}