<p id="demo">单击按钮删除数组的第一个元素</p>

<p id="demo2"></p>

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

<script>

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

function myFunction(){

    var delell = fruits.shift();

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

    x.innerHTML= '删除后数组为：' +  fruits;

    document.getElementById("demo2").innerHTML= '删除的元素是：' +  delell;

}

</script>

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