如何初始化Materialize js文件输入元素？

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/materialize-css@1.0.0/dist/css/materialize.min.css">
<script src="https://cdn.jsdelivr.net/npm/materialize-css@1.0.0/dist/js/materialize.min.js"></script>

<div class="input-field">
  <input type="text" id="myInput">
  <label for="myInput">输入元素</label>
</div>

document.addEventListener('DOMContentLoaded', function() {
  M.AutoInit();
});