省略分割参数 - 在线编辑器

          <p id="demo">单击按钮显示分割后的数组</p>
<button onclick="myFunction()">点我</button>
<script>
  function myFunction() {
    var str = "How are you doing today?";
    var n = str.split();
    document.getElementById("demo").innerHTML = n;
  }
</script>
        