<!DOCTYPE html>charset="utf-8"W3Cschool教程(w3cschool.cn)id="demo"单击按钮给数组添加新的元素。onclick="myFunction()"点我var fruits = ["Banana", "Orange", "Apple", "Mango"];function myFunction(){fruits.push("Kiwi")var x=document.getElementById("demo");x.innerHTML=fruits;}