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<!DOCTYPE html> <html> <body> <a id="myAnchor" href="https://begtut.com/">前往 begtut.com</a> <p>preventDefault() 方法将阻止上面的链接跟随 URL。</p> <p>单击链接并检查是否阻止了默认操作。</p> <script> document.getElementById("myAnchor").addEventListener("click", function(event){ event.preventDefault() alert("Was preventDefault() called: " + event.defaultPrevented); }); </script> </body> </html>