JavaScript DOM操作之CSS多元素选择器
<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>三十课 - JavaScript DOM操作之CSS多元素选择器</title> <script src="http://res.30ke.cn/res/js/console.js"></script> </head> <body> <h1>三十课</h1> <h1>三十课2</h1> <div id="main"></div> <script> var h1s = document.querySelectorAll("h1"); h1s[0].style.color = "red"; console.log(h1s.length); </script> </body> </html>
运行结果
三十课
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