<div class="textfield-with-button">
  <label class="textfield ">
    <input
      type="text"
      name=""
      value=""
      oninput=""
      maxlength=""
      autocomplete=""
      placeholder="..."
    />
    <span class="textfield__label">Input</span>
  </label>
  <button class="btn btn--primary"
      <i class="fas fa-check mr2"></i>
      <span>Speichern</span>
  </button>
</div>