如何阻止标签的默认行为 · js技术点

```html <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body>  <a href="http://www.baidu.com" onclick="alert('我被点击了！'); return false;">百度</a>  <a href="http://www.baidu.com" onclick="return stopDefault()">百度</a> <script type="text/javascript"> function stopDefault(){ alert("我被点击了！"); return false; } </script>  <a href="http://www.baidu.com" id="stop">百度</a> <script type="text/javascript"> document.getElementById("stop").onclick = function(){ alert("我被点击了！"); return false; }; </script>  <a href="http://www.baidu.com" id="prevent">百度</a> <script type="text/javascript"> document.getElementById("prevent").onclick = function(e) { alert("我被点击了！"); window.event.preventDefault(); } </script> </body> </html> ```