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<!DOCTYPE html> <html> <head> <style> #test { left: 100px; top: 50px; margin: 10px; padding: 10px; width: 300px; position: relative; border: 5px solid black } </style> </head> <body> <div id="test"> <p>单击按钮获取测试 div 的左侧和顶部偏移量。</p> <p><button onclick="myFunction()">试一试</button></p> <p id="demo">offsetLeft: <br>offsetTop: </p> </div> <script> function myFunction() { var testDiv = document.getElementById("test"); var demoDiv = document.getElementById("demo"); demoDiv.innerHTML = "offsetLeft: " + testDiv.offsetLeft + "<br>offsetTop: " + testDiv.offsetTop; } </script> </body> </html>