<style>
  * {
    box-sizing: border-box;
  }
  html, body {
    align-items: center;
    background: linear-gradient(45deg, #1f3a93, #f39c12);
    display: flex;
    justify-content: center;
    margin: 0;
    min-height: 100vh;
    padding: 0;
    width: 100vw;
  }
  div {
    background: #fff;
    height: 50px;
    margin: 40px;
    width: 50px;
  }
</style>
<div></div>
<div></div>
<div></div>
div {
  animation: change .5s cubic-bezier(1,.2,.6,1.75) 1s forwards;
}

div:nth-of-type(1) {
  --scale: 1.2;
}

div:nth-of-type(2) {
  --scale: 2.6;
}

div:nth-of-type(3) {
  --scale: 1.8;
}

@keyframes change {
  to {
    transform: scale(var(--scale));
  }
}

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External JavaScript

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