我试图水平中心一个<div>块元素在页面上，并将其设置为最小宽度。最简单的方法是什么?我想要<div>元素内联与我的页面的其余部分。我来举个例子:
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当前回答
我使用div和span标签以及css属性，如块，跨浏览器内联块和文本对齐中心，见我的简单示例
<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
<style>
.block{display:block;}
.text-center{text-align:center;}
.border-dashed-black{border:1px dashed black;}
.inline-block{
display: -moz-inline-stack;
display: inline-block;
zoom: 1;
*display: inline;
}
.border-solid-black{border:1px solid black;}
.text-left{text-align:left;}
</style>
</head>
<body>
<div class="block text-center border-dashed-black">
<span class="block text-center">
<span class="block">
<!-- The Div we want to center set any width as long as it is not more than the container-->
<div class="inline-block text-left border-solid-black" style="width:450px !important;">
jjjjjk
</div>
</span>
</span>
</div>
</body>
</html>
其他回答
如果旧浏览器不是问题，可以使用HTML5 / CSS3。如果他们是，应用腻子，仍然使用HTML5 / CSS3。我假设您的div在这里没有边距或填充，但它们相对容易解释。下面是代码。
.centered {
position: relative;
left: 50%;
transform: translateX(-50%);
}
它的作用是:
定位div相对于它的容器; 将div的左边界水平放置在其容器宽度的50%; 水平向后平移div自身宽度的50%。
很容易想象这个确认div最终将水平居中的过程。作为奖励，你可以垂直居中，没有额外的成本:
.centered-vertically {
position: relative;
top: 50%;
transform: translateY(-50%);
}
这种方法的优点是您不必做任何违反直觉的事情，例如将div视为某种文本，将其包装在一个(通常在语义上无用)额外的容器中，或者赋予它一个固定的宽度，这并不总是可能的。
如果需要，不要忘记转换的供应商前缀。
如果你的<div>有position: absolute你需要使用width: 100%;
#parent {
width: 100%;
text-align: center;
}
#child {
display: inline-block;
}
对这个问题最好的回答是使用margin-auto，但要使用它，你必须知道你的div的宽度在px或%。
CSS代码:
div{
width:30%;
margin-left:auto;
margin-right:auto;
}
问题的标题和内容实际上是不同的，所以我将发布两个解决方案，使用Flexbox。
我猜在IE8和IE9完全被摧毁之前，Flexbox将取代/添加到当前的标准解决方案中;)
检查当前flexbox的浏览器兼容性表
单一的元素
.container { 显示:flex; justify-content:中心; ｝ < div class = "容器" > < img src = " http://placehold.it/100x100 " > < / div >
多个元素，但只以一个为中心
默认行为是flex-direction: row，将所有子项对齐在一行中。将其设置为flex-direction: column将有助于堆叠的行。
.container { display: flex; flex-direction: column; } .centered { align-self: center; } <div class="container"> <p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. </p> <div class="centered"><img src="http://placehold.it/100x100"></div> <p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. </p> </div>
你应该在父元素上使用position: relative和text-align: center，然后在你想居中的子元素上使用display: inline-block。这是一个简单的CSS设计模式，适用于所有主流浏览器。下面是一个示例或查看CodePen示例。
p { text-align: left; } .container { position: relative; display: block; text-align: center; } /* Style your object */ .object { padding: 10px; color: #ffffff; background-color: #556270; } .centerthis { display: inline-block; } <div class="container"> <p>Aeroplanigera Mi Psychopathologia Subdistinctio Chirographum Intuor Sons Superbiloquentia Os Sors Sesquiseptimus Municipatio Archipresbyteratus O Conclusio Compedagogius An Maius Septentrionarius Plas Inproportionabilit Constantinopolis Particularisticus.</p> <span class="object centerthis">Something Centered</span> <p>Aeroplanigera Mi Psychopathologia Subdistinctio Chirographum Intuor Sons Superbiloquentia Os Sors Sesquiseptimus Municipatio Archipresbyteratus O Conclusio Compedagogius.</p> </div>
