一、css实现左侧宽度固定右侧宽度自适应
1、定位
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>自适应</title> <style> *{ padding: 0; margin: 0; } .left{ background: red; width: 200px; height: 200px; position: absolute; left: 0; top:0; } .right{ background: blue; height: 200px; margin-left: 210px; } </style></head><body> <div class="left"> 定宽 </div> <div class="right"> 自适应</div></body></html>2、浮动
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>自适应</title> <style> *{ padding: 0; margin: 0; } .left{ background: red; width: 200px; height: 200px; float: left; } .right{ background: blue; height: 200px; margin-left: 210px; } </style></head><body> <div class="left"> 定宽 </div> <div class="right"> 自适应</div></body></html>3、margin
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>自适应</title> <style> *{ padding: 0; margin: 0; } .left{ background: red; width: 200px; height: 200px; } .right{ background: blue; height: 200px; margin-top: -200px; margin-left: 210px; } </style></head><body> <div class="left"> 定宽 </div> <div class="right"> 自适应</div></body></html>二、css3弹性盒模型实现自适应
1、上下高度固定中间高度自适应
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title></title> <style> *{ margin: 0; padding: 0; } body,html{ height: 100%; } #contain{ display: flex; flex-direction: column; height: 100%; } #top{ height: 200px; background: red; } #center { flex: 1; background: blue; } #bottom{ height: 100px; background: green; } </style> </head><body><div id="contain"> <div id="top">你好</div> <div id="center">你好</div> <div id="bottom">你也好</div></div></body></html>2、左侧宽度固定右侧宽度自适应
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