simple input clear button

<style>
  form {
    position: relative;
    width: 240px;
    margin: 16px;
  }

  input {
    width: 100%;
    padding: 2px 24px 2px 2px;
    box-sizing: border-box;
  }

  button {
    margin-top: 3px;
    margin-right: 3px;
    border-radius: 50%;
    border-style:none;
  }

  .wrapper {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
  }

  input:not(:valid)+.wrapper {
    display: none;
  }
</style>

<form>
  <input type="text" required>
  <div class="wrapper">
    <button type="reset" tabindex="-1" aria-label="Reset">
      &times;
    </button>
  </div>
</form>