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当属性使用calc时,里面可以使用100%或vh(当前可视区域100%高度),该属性值会动态计算并修改
<!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> html,body { height: 100%; } body { margin: 0; display: flex; } .box1 { height: calc(100% - 200px); background-color: #bfa; width:20%; } .box2 { height: calc(100vh - 200px); background-color: pink; width:20%; } .box3 { height: calc(100vh - 200px); background-color: coral; width:20%; } .box4 { width: 100px; height: 100px; background-color: grey; } </style> </head> <body> <div class="box1"></div> <div class="box2"></div> <div class="box3"></div> <div class="box4"></div> </body> </html>
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