<!DOCTYPE html><html><body><p id="demo">Click the button to add a new element to the array.</p><button onclick="myFunction()">Try it</button><script>var fruits = ["Banana","Orange","Apple","Mango"];function myFunction(){fruits.push("jb51.net")var x=document.getElementById("demo");x.innerHTML=fruits;}</script></body></html>上面的代码执行后输出如下结果