如何在js数组的指定位置添加元素？

       <p style="line-height: normal;">//在数组指定位置插入

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

fruits.splice(2, 0, "Lemon", "Kiwi");

//输出结果

//Banana, Orange, Lemon, Kiwi, Apple, Mango

//在数组开头插入

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

shuiguo.splice(0, 0, "Lemon");

//输出结果

//Lemon, Banana, Orange, Apple, Mango <br></p>

var arr=[1,2,3,4];

 arr.push(6,7,8); //push 压栈 向数组末尾添加元素

 console.log(arr); //arr=[1,2,3,4,6,7,8];

 var arr1=[1,2,3,4,5,6];

 arr1.pop();      //pop 出栈 删除数组最后一个数据

 console.log(arr1); //arr=[1,2,3,4,5];

var arr=[2,3,4];

arr.unshift("hello",1,[6,8]);//参数可以是数值，字符，数组

console.log(arr);