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<!DOCTYPE html> <html> <head> <style> #myDIV { margin-top: 10px; height: 250px; width: 250px; overflow: auto; } #content { height: 800px; width: 2000px; padding: 10px; background-color: coral; } </style> </head> <body> <p>单击该按钮可获取 id="content" 的 div 元素的整个高度（垂直）和宽度（水平）。</p> <button onclick="myFunction()">试一试</button> <div id="myDIV"> <div id="content">一些内容..</div> </div> <p id="demo"></p> <script> function myFunction() { var elmnt = document.getElementById("content"); var y = elmnt.scrollHeight; var x = elmnt.scrollWidth; document.getElementById ("demo").innerHTML = "Height: " + y + "px<br>Width: " + x + "px"; } </script> </body> </html>