jQuery third-party plug-ins, simple to use
demand:
Click the button to make the background color from pink box turns blue, becomes the width of 400px
1. Native js
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> #box { width: 200px; height: 200px; background-color: pink; } </style> </head> <body> <button id="btn">点击显示</button> <div id="box"> </div> <script> window.onload = function(){ var btn = document.getElementById("btn"); btn.onclick = function(){ var box = document.getElementById("box"); box.style.backgroundColor = "skyblue";
box.style.width = "400px";
} } </script> </body> </html>
Renderings
2.jQuery
Note: introducing jquery library
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> #box { width: 200px; height: 200px; background-color: pink; } </style> <script src="./js/jquery.min.js"></script> <script> $(function () { $("#btn").click(function () { $("#box").css({ "backgroundColor": "skyblue", "width": "400px" }); }) }) </script> </head> <body> <button id="btn">点击显示</button> <div id="box"> </div> </body> </html>
Renderings