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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <title>Document</title>
- <style>
- .active{
- color: red;
- }
- </style>
- </head>
- <body>
- <a href="https://www.baidu.com">百度</a>
- <div class="btn">切换</div>
- <script>
- var oA = document.getElementsByTagName("a")[0];
- var oBtn = document.getElementsByClassName("btn")[0];
- oBtn.onclick = function(){
- oA.innerText = "淘宝";
- oA.setAttribute("href","https://www.tmall.com");
- console.log(oA.getAttribute("href"));
- oBtn.setAttribute("class","btn active")
- }
- </script>
- </body>
- </html>
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