将 Unicode 编码转换为一个字符串

<p id="demo">单击按钮显示指定UNICODE编码的字符。</p>

<button onclick="myFunction()">点我</button>

<script>

  function myFunction() {

    var n = String.fromCharCode(72, 69, 76, 76, 79);

    document.getElementById("demo").innerHTML = n;

  }

</script>