js动态添加数组可以按下面的步骤:
1、在数组的开头添加新元素 - unshift()
源代码:
Click the button to add elements to the array.
Try it
function myFunction()
{
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.unshift("Lemon","Pineapple");
var x=document.getElementById("demo");
x.innerHTML=fruits;
}
Note:The unshift() method does not work properly in Internet Explorer 8 and earlier, the values will be inserted, but the return value will beundefined.
测试结果:
Lemon,Pineapple,Banana,Orange,Apple,Mango
2、在数组的第2位置添加一个元素 - splice()
源代码:
Click the button to add elements to the array.
Try it
function myFunction()
{
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.splice(2,0,"Lemon","Kiwi");
var x=document.getElementById("demo");
x.innerHTML=fruits;
}
测试结果:
Banana,Orange,Lemon,Kiwi,Apple,Mango
3、数组的末尾添加新的元素 - push()
源代码:
Click the button to add a new element to the array.
Try it
var fruits = ["Banana", "Orange", "Apple", "Mango"];
function myFunction()
{
fruits.push("Kiwi")
var x=document.getElementById("demo");
x.innerHTML=fruits;
}
测试结果:
Banana,Orange,Apple,Mango,Kiwi
