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这种办法主要通过 overflow 触发 BFC,而 BFC 不会重叠浮动元素。因为设置 overflow:hidden 并不会触发 IE6-浏览器的 haslayout 属性，所以需要设置 zoom:1 来兼容 IE6-浏览器。具体代码如下：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> .parent { margin: 0 auto; // 使父容器水平居中显示 overflow: hidden; zoom: 1; max-width: 1000px; } .left { float: left; margin-right: 20px; width: 200px; background-color: green; } .right { overflow: hidden; zoom: 1; background-color: yellow; } </style></head><body> <div class="parent"> <div class="left"> <p>left left left left</p> </div> <div class="right"> <p>right</p> <p>right</p> </div> </div> </body></html>float使左边的元素脱离文档流，右边的元素可以和左边的元素显示在同一行，设置margin-left让右边的元素不覆盖掉左边的元素， 代码如下：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> .parent { margin: 0 auto; max-width: 1000px; } .parent::after { content: ''; display: table; clear: both; } .left { float: left; width: 200px; background-color: green; } .right { margin-left: 200px; background-color: yellow; } </style></head><body> <div class="parent"> <div class="left"> <p>left left left left</p> </div> <div class="right"> <p>right</p> <p>right</p> <p>right</p> </div> </div> </body></html>左边绝对定位，右边设置margin-left，代码如下：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> .parent { position: relative; margin: 0 auto; max-width: 1000px; } .left { position: absolute; width: 200px; background-color: green; } .right { margin-left: 200px; background-color: yellow; } </style></head><body> <div class="parent"> <div class="left"> <p>left left left left</p> </div> <div class="right"> <p>right</p> <p>right</p> <p>right</p> </div> </div> </body></html>flex布局可以使两个子元素显示在同一行，只需左边的宽度固定，即可以实现效果， 代码如下：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> .parent { display: flex; margin: 0 auto; max-width: 1000px; } .left { width: 200px; background-color: green; } .right { margin-left: 20px; flex: 1; background-color: yellow; } </style></head><body> <div class="parent"> <div class="left"> <p>left left left left</p> </div> <div class="right"> <p>right</p> <p>right</p> <p>right</p> </div> </div></body></html>
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