JSFiddle - React, Tailwind, and code Playground

HTML

<h2 id="demo">這裡會被取代</h2>
<button onclick="showImage()">顯示圖片</button>
<button onclick="showLink()">顯示超連結</button>

<script>
  function showImage() {
    document.getElementById("demo").innerHTML = "???"; // 請學生補
  }
  function showLink() {
    document.getElementById("demo").innerHTML = "???"; // 請學生補
  }
</script>