HTML--元素居中各种处理方法
2024-10-08 06:14:38
1、水平居中
对于行内元素可以使用:
.center-children {
text-align: center;
}
对于块元素,你可以设置其左右外边距为:auto;同时你还应该设置该元素的宽度,不然的话,元素的宽度会撑满整个浏览器或者一种是没反应(不过你设置背景就会看到了)。
.center-me {
margin: 0 auto;
}
如果你想让多个块元素在一行当中显示,首先你得设置display的属性,inline-block;在使用上面说的方法。还有一种方式是设置display:flex;justify-content: center;
CSS代码:
body {
background: #f06d06;
font-size: 80%;
} main {
background: white;
margin: 20px 0;
padding: 10px;
} main div {
background: black;
color: white;
padding: 15px;
max-width: 125px;
margin: 5px;
} .inline-block-center {
text-align: center;
}
.inline-block-center div {
display: inline-block;
text-align: left;
} .flex-center {
display: flex;
justify-content: center;
}
HTML代码:
<main class="inline-block-center">
<div>
I'm an element that is block-like with my siblings and we're centered in a row.
</div>
<div>
I'm an element that is block-like with my siblings and we're centered in a row. I have more content in me than my siblings do.
</div>
<div>
I'm an element that is block-like with my siblings and we're centered in a row.
</div>
</main> <main class="flex-center">
<div>
I'm an element that is block-like with my siblings and we're centered in a row.
</div>
<div>
I'm an element that is block-like with my siblings and we're centered in a row. I have more content in me than my siblings do.
</div>
<div>
I'm an element that is block-like with my siblings and we're centered in a row.
</div>
</main>
2、垂直居中
1)如果只是单行的情况:让行高等于元素的高度来欺骗别人达到居中的目的。
<main>
<div>
I'm a centered line.
</div>
</main>
body {
background: #f06d06;
font-size: 80%;
} main {
background: white;
margin: 20px 0;
padding: 40px;
} main div {
background: black;
color: white;
height: 100px;
line-height: 100px;
padding: 20px;
width: 50%;
white-space: nowrap;
}
white-space: nowrap;表示段落中的文本不换行;超出宽度的将不会在显示。
2)如果要多行居中,一般设置上下的内边距来实现,不行的话还有两种方法:一种是将文本放置在表格单中。另一种则是模仿表格的形式。首先为其设置一个容器,再将装有文本的容器放在里面。设置边框,对齐方式,显示方式等就可以了。
<table>
<tr>
<td>
I'm vertically centered multiple lines of text in a real table cell.
</td>
</tr>
</table> <div class="center-table">
<p>I'm vertically centered multiple lines of text in a CSS-created table layout.</p>
</div> body {
background: #f06d06;
font-size: 80%;
} table {
background: white;
width: 240px;
border-collapse: separate;
margin: 20px;
height: 250px;
} table td {
background: black;
color: white;
padding: 20px;
border: 10px solid white;
/* default is vertical-align: middle; */
} .center-table {
display: table;
height: 250px;
background: white;
width: 240px;
margin: 20px;
}
.center-table p {
display: table-cell;
margin:;
background: black;
color: white;
padding: 20px;
border: 10px solid white;
vertical-align: middle;
}
border-collapse 属性设置表格的边框是否被合并为一个单一的边框,还是象在标准的 HTML 中那样分开显示;
display:table- cell属性指让标签元素以表格单元格的形式呈现,类似于td标签。目前IE8+以及其他现代浏览器都是支持此属性的,但是IE6/7只能对你说 sorry了。
如果上述方法都不行,恐怕就得使用flex了
<div class="flex-center">
<p>I'm vertically centered multiple lines of text in a flexbox container.</p>
</div> body {
background: #f06d06;
font-size: 80%;
} div {
background: white;
width: 240px;
margin: 20px;
} .flex-center {
background: black;
color: white;
border: 10px solid white;
display: flex;
flex-direction: column;
justify-content: center;
height: 200px;
resize: vertical;
overflow: auto;
}
.flex-center p {
margin:;
padding: 20px;
}
如果这个也行不通的话,使用下面的ghost-center.
<div class="ghost-center">
<p>I'm vertically centered multiple lines of text in a container. Centered with a ghost pseudo element</p>
</div> body {
background: #f06d06;
font-size: 80%;
} div {
background: white;
width: 240px;
height: 200px;
margin: 20px;
color: white;
resize: vertical;
overflow: auto;
padding: 20px;
} .ghost-center {
position: relative;
}
.ghost-center::before {
content: " ";
display: inline-block;
height: 100%;
width: 1%;
vertical-align: middle;
}
.ghost-center p {
display: inline-block;
vertical-align: middle;
width: 190px;
margin:;
padding: 20px;
background: black;
}
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