mdl-使用max-width时菜单无法正常工作
mdl-使用max-width时菜单无法正常工作
提问于 2017-02-26 19:51:13
如果我为mdl-layout__header-row类设置了max-width属性，那么下拉菜单就不能正常工作了，它们没有对齐。去掉max-width属性，一切都会正常工作。
代码：
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<title>Test Page</title>
<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
<link rel="stylesheet" href="https://code.getmdl.io/1.3.0/material.red-light_blue.min.css" />
<script src="https://code.getmdl.io/1.3.0/material.min.js"></script>
</head>
<body>
<header class="mdl-layout__header">
<div class="mdl-layout__header-row" style="max-width: 1200px;width: 100%;margin: auto;">
<a href="/">
<img style="height: 60px;" src="http://www.vwshops.com/dummy-store-1/img/my-shop-logo-1452186152.jpg" />
</a>
<span>Logo</span>
<button id="DROPDOWN_RIGHT" class="mdl-button mdl-js-button mdl-button--icon">
<i class="material-icons">arrow_drop_down</i>
</button>
<ul class="mdl-menu mdl-menu--bottom-right mdl-js-menu mdl-js-ripple-effect language-menu" for="DROPDOWN_RIGHT">
<li class="mdl-menu__item">One</li>
<li class="mdl-menu__item">Two</li>
<li class="mdl-menu__item">Three</li>
</ul>
<button style="margin-left: auto;" id="DROPDOWN_LEFT" class="mdl-button mdl-js-button mdl-button--icon">
<i class="material-icons">arrow_drop_down</i>
</button>
<ul class="mdl-menu mdl-menu--bottom-right mdl-js-menu mdl-js-ripple-effect language-menu" for="DROPDOWN_LEFT">
<li class="mdl-menu__item">One</li>
<li class="mdl-menu__item">Two</li>
<li class="mdl-menu__item">Three</li>
</ul>
</div>
</header>
</body>
</html>回答 1
Stack Overflow用户
回答已采纳
发布于 2017-02-26 20:10:57
添加position:relative。这将阻止定位的元素在.mdl-layout__header-row div中偏离行。当使用绝对定位来定位元素时，您需要设置一个父容器来定位它们，并通过为它们设置一个position:relative来实现这一点-否则它将定位到它们所定位的最外层的html元素/文档。
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<title>Test Page</title>
<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
<link rel="stylesheet" href="https://code.getmdl.io/1.3.0/material.red-light_blue.min.css" />
<script src="https://code.getmdl.io/1.3.0/material.min.js"></script>
</head>
<body>
<header class="mdl-layout__header">
<div class="mdl-layout__header-row" style="max-width: 1200px;width: 100%;margin: auto; position:relative;">
<a href="/">
<img style="height: 60px;" src="http://www.vwshops.com/dummy-store-1/img/my-shop-logo-1452186152.jpg" />
</a>
<span>Logo</span>
<button id="DROPDOWN_RIGHT" class="mdl-button mdl-js-button mdl-button--icon">
<i class="material-icons">arrow_drop_down</i>
</button>
<ul class="mdl-menu mdl-menu--bottom-right mdl-js-menu mdl-js-ripple-effect language-menu" for="DROPDOWN_RIGHT">
<li class="mdl-menu__item">One</li>
<li class="mdl-menu__item">Two</li>
<li class="mdl-menu__item">Three</li>
</ul>
<button style="margin-left: auto;" id="DROPDOWN_LEFT" class="mdl-button mdl-js-button mdl-button--icon">
<i class="material-icons">arrow_drop_down</i>
</button>
<ul class="mdl-menu mdl-menu--bottom-right mdl-js-menu mdl-js-ripple-effect language-menu" for="DROPDOWN_LEFT">
<li class="mdl-menu__item">One</li>
<li class="mdl-menu__item">Two</li>
<li class="mdl-menu__item">Three</li>
</ul>
</div>
</header>
</body>
</html>页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/42468109
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