页面两列布局高度填满

时间 2019-11-12

标签页面布局高度填满繁體版

原文原文链接

问题来源

昨天早上某面试提出的一个问题，脑子一热漏写了一个条件，心塞。javascript

问题大概是写一个两列布局，左边固定，高度都是默认填满页面，右边内容高度超出浏览器窗口出现滚动条。css

解决办法

今天仔细想了下，用浮动作的话，高度很差弄成填满的。折腾了一下子，搞出两种方案（不使用js的）。html

左侧：fixed，右侧：absolute，min-height:100%，width为calc(100% - [左侧的width])，同时margin-left也为左侧的width
html的overflow-x设置为hidden，右侧就能够不用calc了，直接width: 100%，不过这样的话，右侧元素使用margin 0 auto居中就会向右边偏移，偏移的长度为左侧的width

测试代码：java

<!doctype html>
<html>
<head>
  <meta charset="utf-8">
  <title>test layout</title>
  <style type="text/css"> *{ padding: 0; margin: 0; } /*html{ overflow-x:hidden; }*/ /*方法2*/ .left{ position: fixed; top: 0; left: 0; width: 100px; height: 100%; background-color: red; } .right{ position: absolute; width: calc(100% - 100px); /*方法1*/ /*width: 100%;*/ /*方法2*/ min-height: 100%; margin-left: 100px; background-color: blue; } .center{ width: 100px; background-color: yellow; margin: 0 auto; } </style>
  <script> window.onload = function(){ var addBtn = document.getElementsByClassName('js-add-btn')[0]; var delBtn = document.getElementsByClassName('js-del-btn')[0]; var right = document.getElementsByClassName('right')[0]; addBtn.onclick = function(e){ var pNode = document.createElement('p'); pNode.innerText = 'content'; for(var i = 0; i < 20; i++){ var cpNode = pNode.cloneNode(true); right.appendChild(cpNode); } } delBtn.onclick = function(e){ var children = right.children; var len = children.length; var delCount = len > 20 ? 20 : len; for(var i = 0; i < delCount; i++){ right.removeChild(children[len - (i + 1)]); } } } </script>
</head>
<body>
  <div class="left">
    <p>left</p>
    <button class="js-add-btn">增长右侧内容</button>
    <button class="js-del-btn">删除右侧内容</button>
  </div>
  <div class="right">
    <div class="center">
      <p>centered content</p>
    </div>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
    <p>lots of content</p>
  </div>
</body>
</html>

jsfiddle： https://jsfiddle.net/g9j8mcf4/1/面试