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<!DOCTYPE html> <html> <head> <style> #myDIV { height: 250px; width: 400px; padding: 10px; margin: 15px; border: 5px solid red; background-color: lightblue; } </style> </head> <body> <p>单击按钮获取 div 的高度和宽度，包括填充（同时使用 clientHeight 和 clientWidth）。</p> <button onclick="myFunction()">试一试</button> <div id="myDIV"> <b>有关此 div 的信息：</b><br> Height: 250px<br> Width: 400px<br> padding: 10px<br> margin: 15px<br> border: 5px<br> <p id="demo"></p> </div> <script> function myFunction() { var elmnt = document.getElementById("myDIV"); var txt = "Height including padding: " + elmnt.clientHeight + "px<br>"; txt += "Width including padding: " + elmnt.clientWidth + "px"; document.getElementById("demo").innerHTML = txt; } </script> </body> </html>