<body>
  <header>

    <h1 class="cutoffstart" data-text="Text with cut off">Text with cut off</h1>

  </header>
</body>
$background-color: #080851;
$h1-font-size: 8vw;

@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@900&display=swap");

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  text-rendering: optimizeLegibility;
  font-kerning: normal;
  background-color: $background-color;
}

header {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  max-width: 100vw;
  margin: 0;
  padding: 0 7vw;
  
  background-image:url(https://raw.githubusercontent.com/andrew-sims/andrew-sims.github.io/master/images/codepen/aerial-ocean.jpg);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: top;
    background-color: inherit;
    background-blend-mode: soft-light;
}

h1 {
  font-family: "Poppins", sans-serif;
  font-size: $h1-font-size;
  font-weight: 900;
  line-height: 0.85;
  letter-spacing: -0.02em;
  text-align: center;
  color: white;
  text-transform: uppercase;
}

.cutoffstart {
  transition: all 1s ease-in-out;
  position: relative;
  margin-top: 0.675;
  
  &:before {
    transition: all 700ms ease-in-out;
    user-select: none;
    content: attr(data-text);
    display: flex;
    position: absolute;
    top: 0;
    height: 0;
    overflow: hidden;
    text-transform: uppercase;
  }

  &:after {
    transition: all 1s ease-in-out;
    user-select: none;
    content: attr(data-text);
    display: flex;
    position: absolute;
    top: 0;
    height: 0;
    overflow: hidden;
    text-transform: uppercase;
  }
}

.cutoffend {
  margin-top: 1.35em;
  
  &:before {
    height: calc(#{$h1-font-size} / 2.6);
    top: -0.43em;
  }
  
  &:after {
    height: calc(#{$h1-font-size} / 4.5);
    top: -0.69em;
  }
}

.stoptransitions {
  transition: unset;
  
  &:before {
    transition: unset;
  }
  
  &:after {
    transition: unset;
  }
}
View Compiled
setTimeout(() => {
  $(".cutoffstart").addClass("cutoffend");
}, 800);

setTimeout(() => {
  $(".cutoffend").addClass("stoptransitions");
}, 2000);

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js