CodePen Embed - bootstrap_basic_course_components_button

Live

 
<div class="container">
  <div class="row">
    <div class="col">
      <a href="#" class="btn">Buy Now</a>
      <a href="#" class="btn">Buy Tomorrow</a>
      <a href="#" class="btn">Never buy</a>
    </div>
  </div>
</div>

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External CSS

External JavaScript

https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.2/js/bootstrap.min.js

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(#{$rfs-mq-property-width}: #{$rfs-mq-value}), (#{$rfs-mq-property-height}: #{$rfs-mq-value}) {\\n        @content;\\n      }\\n    }\\n    @else {\\n      @media (#{$rfs-mq-property-width}: #{$rfs-mq-value}) and (#{$rfs-mq-property-height}: #{$rfs-mq-value}) {\\n        @content;\\n      }\\n    }\\n  }\\n  @else {\\n    @media (#{$rfs-mq-property-width}: #{$rfs-mq-value}) {\\n      @content;\\n    }\\n  }\\n}\\n\\n// Internal mixin that adds disable classes to the selector if needed.\\n@mixin _rfs-rule {\\n  @if $rfs-class == disable and $rfs-mode == max-media-query {\\n    // Adding an extra class increases specificity, which prevents the media query to override the property\\n    &,\\n    .disable-rfs &,\\n    &.disable-rfs {\\n      @content;\\n    }\\n  }\\n  @else if $rfs-class == enable and $rfs-mode == min-media-query {\\n    .enable-rfs &,\\n    &.enable-rfs {\\n      @content;\\n    }\\n  } @else {\\n    @content;\\n  }\\n}\\n\\n// Internal mixin that adds enable classes to the selector if needed.\\n@mixin _rfs-media-query-rule {\\n\\n  @if $rfs-class == enable {\\n    @if $rfs-mode == min-media-query {\\n      @content;\\n    }\\n\\n    @include _rfs-media-query () {\\n      .enable-rfs &,\\n      &.enable-rfs {\\n        @content;\\n      }\\n    }\\n  }\\n  @else {\\n    @if $rfs-class == disable and $rfs-mode == min-media-query {\\n      .disable-rfs &,\\n      &.disable-rfs {\\n        @content;\\n      }\\n    }\\n    @include _rfs-media-query () {\\n      @content;\\n    }\\n  }\\n}\\n\\n// Helper function to get the formatted non-responsive value\\n@function rfs-value($values) {\\n  // Convert to list\\n  $values: if(type-of($values) != list, ($values,), $values);\\n\\n  $val: \\\"\\\";\\n\\n  // Loop over each value and calculate value\\n  @each $value in $values {\\n    @if $value == 0 {\\n      $val: $val + \\\" 0\\\";\\n    }\\n    @else {\\n      // Cache $value unit\\n      $unit: if(type-of($value) == \\\"number\\\", unit($value), false);\\n\\n      @if $unit == px {\\n        // Convert to rem if needed\\n        $val: $val + \\\" \\\" + if($rfs-unit == rem, #{divide($value, $value * 0 + $rfs-rem-value)}rem, $value);\\n      }\\n      @else if $unit == rem {\\n        // Convert to px if needed\\n        $val: $val + \\\" \\\" + if($rfs-unit == px, #{divide($value, $value * 0 + 1) * $rfs-rem-value}px, $value);\\n      } @else {\\n        // If $value isn't a number (like inherit) or $value has a unit (not px or rem, like 1.5em) or $ is 0, just print the value\\n        $val: $val + \\\" \\\" + $value;\\n      }\\n    }\\n  }\\n\\n  // Remove first space\\n  @return unquote(str-slice($val, 2));\\n}\\n\\n// Helper function to get the responsive value calculated by RFS\\n@function rfs-fluid-value($values) {\\n  // Convert to list\\n  $values: if(type-of($values) != list, ($values,), $values);\\n\\n  $val: \\\"\\\";\\n\\n  // Loop over each value and calculate value\\n  @each $value in $values {\\n    @if $value == 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