JavaScript DOM操作之属性存在检测 hasAttribute
<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>三十课 - JavaScript DOM操作之属性存在检测 hasAttribute</title> <script src="http://res.30ke.cn/res/js/console.js"></script> </head> <body> <img id="img" src="http://res.30ke.cn/res/image/30ke.png" width="200px" /> <div id="main"></div> <script> var img = document.querySelector("#img"); console.log(img.hasAttribute("width")); console.log(img.hasAttribute("height")); </script> </body> </html>
运行结果
三十课
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