JSFiddle - React, Tailwind, and code Playground

HTML

<div class="display-flex percentage-max-width">
  <div class="display-flex">
    <p class="truncated">
      This long line of text should be truncated. This long line of text should be truncated.
    </p>
  </div>
</div>

CSS

.truncated {
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}

.percentage-max-width {
  max-width: 80%;
}

.display-flex {
  display: flex;
  overflow: hidden;
}