数组排序（按字母顺序升序）- sort()

<p id="demo">单击按钮升序排列数组。</p>

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

<script>

  function myFunction() {

    var fruits = ["Banana", "Orange", "Apple", "Mango"];

    fruits.sort();

    var x = document.getElementById("demo");

    x.innerHTML = fruits;

  }

</script>