<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <style> * { padding: 0; margin: 0; } body { padding: 20px; border: 20px solid blue; } .box1 { width: 200px; height: 200px; background-color: pink; padding: 20px; border: 20px solid red; margin: 20px; } .box2 { position: relative; width: 200px; height: 200px; background-color: pink; padding: 20px; border: 20px solid red; margin: 20px; } .box3 { position: absolute; width: 100px; height: 100px; background-color: aqua; margin: 20px; padding: 20px; border: 10px solid black; } </style> </head> <body> <div class="box1"></div> <div class="box2"> <div class="box3"></div> </div> <script> var box1 = document.querySelector(".box1"); console.log(box1.offsetWidth); //280px content + padding + border console.log(box1.offsetHeight); //280px content + padding + border console.log(box1.clientHeight); //240px content + padding console.log(box1.clientWidth); //240px content + padding console.log(box1.offsetTop); // 60px 单个盒子下,盒子外边框相对于body外边框的大小 console.log(box1.offsetLeft); //60px 单个盒子下,盒子外边框相对于body外边框的大小 console.log(box1.clientTop); // 20px box1的上边框大小 console.log(box1.clientLeft); // 20px box1的左边框大小 console.log("--------------------------"); var box2 = document.querySelector(".box2"); var box3 = document.querySelector(".box3"); console.log(box3.offsetWidth); //160px content + padding + border console.log(box3.offsetHeight); //160px content + padding + border console.log(box3.clientHeight); //140px content + padding console.log(box3.clientWidth); //140px content + padding console.log(box3.offsetTop); // 40px 嵌套盒子(父盒子)下且有定位,相对于外盒子内边框的大小 console.log(box3.offsetLeft); //40px 嵌套盒子(父盒子)下且有定位,相对于外盒子内边框的大小 console.log(box3.clientTop); // 10px box3的上边框大小 console.log(box3.clientLeft); // 10px box3的左边框大小 </script> </body> </html>