Truncate text multiline

If the text is longer than one line, it will be truncated for n lines and end with an gradient fade.

<p class="truncate-text-multiline">
  Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut
  labore et.
</p>

.truncate-text-multiline {
  overflow: hidden;
  display: block;
  height: 109.2px;
  margin: 0 auto;
  font-size: 26px;
  line-height: 1.4;
  width: 400px;
  position: relative;
}

.truncate-text-multiline:after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 150px;
  height: 36.4px;
  background: linear-gradient(to right, rgba(0, 0, 0, 0), #f5f6f9 50%);
}

Explanation

  1. overflow: hidden prevents the text from overflowing its dimensions (for a block, 100% width and auto height).
  2. width: 400px ensures the element has a dimension.
  3. height: 109.2px calculated value for height, it equals font-size * line-height * numberOfLines (in this case 26 * 1.4 * 3 = 109.2)
  4. height: 36.4px calculated value for gradient container, it equals font-size * line-height (in this case 26 * 1.4 = 36.4)
  5. background: linear-gradient(to right, rgba(0, 0, 0, 0), #f5f6f9 50%) gradient from transparent to #f5f6f9

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