我们将创建一个数组并将一个元素添加到索引2中:
var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai...Jim";
arr[4] = "Borge";
console.log(arr.join());//Jani,Hege,Stale,Kai Jim,Borge
arr.splice(2, 0, "Lene...");
console.log(arr.join());//Jani,Hege,Lene,Stale,Kai Jim,Borge
总结
splice是数组中常见用来插入指定位置的方法,熟练掌握数组的方法可以从一方面反映前端