《Web开发中让盒子居中的几种方法》-HTML Tutorial-php.cn

Home

Web Front-end

HTML Tutorial

《Web开发中让盒子居中的几种方法》

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jun 20, 2016 am 08:42 AM

一、记录下几种盒子居中的方法：

1.0、margin固定宽高居中；

2.0、负margin居中；

3.0、绝对定位居中；

4.0、table-cell居中；

5.0、flex居中；

6.0、transform居中；

7.0、不确定宽高居中(绝对定位百分数)；

8.0、button居中。

二、代码演示(html使用同一个Demo)：

html Demo：

<span style="color: #0000ff;"><span style="color: #800000;">body</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">id</span><span style="color: #0000ff;">="container"</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">id</span><span style="color: #0000ff;">="box"</span><span style="color: #0000ff;">></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"></span><span style="color: #800000;">body</span><span style="color: #0000ff;">></span></span></span></span>

1.0、margin固定宽高居中(演示)

这种定位方法纯粹是靠宽高和margin拼出来的，不是很灵活。

CSS：

<span style="color: #800000;">#container </span>{<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 600px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 500px</span>;<span style="color: #ff0000;">
    border</span>:<span style="color: #0000ff;"> 1px solid #000</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> auto</span>;
}<span style="color: #800000;">
#box </span>{<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> 150px 200px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;"> #0ff</span>;
}

2.0、负margin居中(演示)

利用负的margin来进行居中，需要知道固定宽高，限制比较大。

CSS:

<span style="color: #800000;">#container </span>{<span style="color: #ff0000;">
    position</span>:<span style="color: #0000ff;"> relative</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 600px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 500px</span>;<span style="color: #ff0000;">
    border</span>:<span style="color: #0000ff;"> 1px solid #000</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> auto</span>;
}<span style="color: #800000;">
#box </span>{<span style="color: #ff0000;">
    position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    left</span>:<span style="color: #0000ff;"> 50%</span>;<span style="color: #ff0000;">
    top</span>:<span style="color: #0000ff;"> 50%</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> -100px -100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;"> #0ff</span>;
}

3.0、绝对定位居中(演示)

利用绝对定位居中，非常常用的一种方法。

CSS:

<span style="color: #800000;">#container </span>{<span style="color: #ff0000;">
    position</span>:<span style="color: #0000ff;"> relative</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 600px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 500px</span>;<span style="color: #ff0000;">
    border</span>:<span style="color: #0000ff;"> 1px solid #000</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> auto</span>;
}<span style="color: #800000;">
#box </span>{<span style="color: #ff0000;">
    position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    left</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
    top</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
    right</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
    bottom</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> auto</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;"> #0ff</span>;
}

4.0、table-cell居中(演示)

利用table-cell来控制垂直居中。

CSS:

<span style="color: #800000;">#container </span>{<span style="color: #ff0000;">
    display</span>:<span style="color: #0000ff;"> table-cell</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 600px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 500px</span>;<span style="color: #ff0000;">
    vertical-align</span>:<span style="color: #0000ff;"> middle</span>;<span style="color: #ff0000;">
    border</span>:<span style="color: #0000ff;"> 1px solid #000</span>;
}<span style="color: #800000;">
#box </span>{<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> 0 auto</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;"> #0ff</span>;
}

5.0、flex居中(演示)

CSS3中引入的新布局方式，比较好用。缺点：IE9以及IE9一下不兼容。

CSS:

<span style="color: #800000;">#container </span>{<span style="color: #ff0000;">
    display</span>:<span style="color: #0000ff;"> -webkit-flex</span>;<span style="color: #ff0000;">
    display</span>:<span style="color: #0000ff;"> flex</span>;<span style="color: #ff0000;">
    -webkit-align-items</span>:<span style="color: #0000ff;"> center</span>;<span style="color: #ff0000;">
            align-items</span>:<span style="color: #0000ff;"> center</span>;<span style="color: #ff0000;">
    -webkit-justify-content</span>:<span style="color: #0000ff;"> center</span>;<span style="color: #ff0000;">
            justify-content</span>:<span style="color: #0000ff;"> center</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 600px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 500px</span>;<span style="color: #ff0000;">
    border</span>:<span style="color: #0000ff;"> 1px solid #000</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> auto</span>;
}<span style="color: #800000;">
#box </span>{<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;"> #0ff</span>;
}

6.0、transform居中(演示)

这种方法灵活运用CSS中transform属性，较为新奇。缺点是IE9下不兼容。

CSS:

<span style="color: #800000;">#container </span>{<span style="color: #ff0000;">
    position</span>:<span style="color: #0000ff;"> relative</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 600px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 600px</span>;<span style="color: #ff0000;">
    border</span>:<span style="color: #0000ff;"> 1px solid #000</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> auto</span>;
}<span style="color: #800000;">
#box </span>{<span style="color: #ff0000;">
    position</span>:<span style="color: #0000ff;"> relative</span>;<span style="color: #ff0000;">
    top</span>:<span style="color: #0000ff;"> 50%</span>;<span style="color: #ff0000;">
    left</span>:<span style="color: #0000ff;"> 50%</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    transform</span>:<span style="color: #0000ff;"> translate(-50%, -50%)</span>;<span style="color: #ff0000;">
    -webkit-transform</span>:<span style="color: #0000ff;"> translate(-50%, -50%)</span>;<span style="color: #ff0000;">
    -ms-transform</span>:<span style="color: #0000ff;"> translate(-50%, -50%)</span>;<span style="color: #ff0000;">
    -moz-transform</span>:<span style="color: #0000ff;"> translate(-50%, -50%)</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;"> #0ff</span>;
}

7.0、不确定宽高居中(绝对定位百分数)(演示)

这种不确定宽高的居中，较为灵活。只需要保证left和right的百分数一样就可以实现水平居中，保证top和bottom的百分数一样就可以实现垂直居中。

CSS:

<span style="color: #800000;">#container </span>{<span style="color: #ff0000;">
    position</span>:<span style="color: #0000ff;"> relative</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 600px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 500px</span>;<span style="color: #ff0000;">
    border</span>:<span style="color: #0000ff;"> 1px solid #000</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> auto</span>;
}<span style="color: #800000;">
#box </span>{<span style="color: #ff0000;">
    position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;">
    left</span>:<span style="color: #0000ff;"> 30%</span>;<span style="color: #ff0000;">
    right</span>:<span style="color: #0000ff;"> 30%</span>;<span style="color: #ff0000;">
    top</span>:<span style="color: #0000ff;"> 25%</span>;<span style="color: #ff0000;">
    bottom</span>:<span style="color: #0000ff;"> 25%</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;"> #0ff</span>;
}

8.0、button居中(演示)

利用button做外容器，里边的块元素会自动垂直居中，只需要控制一下水平居中就可以达到效果。

HTML：

<span style="color: #0000ff;"><span style="color: #800000;">button</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"><span style="color: #800000;">div</span><span style="color: #0000ff;">></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"></span><span style="color: #800000;">button</span><span style="color: #0000ff;">></span></span></span>

CSS：

<span style="color: #800000;">button </span>{<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 600px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 500px</span>;<span style="color: #ff0000;">
    border</span>:<span style="color: #0000ff;"> 1px solid #000</span>;
}<span style="color: #800000;">
div </span>{<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> 0 auto</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;"> #0ff</span>;
}

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

What is the difference between an HTML tag and an HTML attribute?May 14, 2025 am 12:01 AM

HTMLtagsdefinethestructureofawebpage,whileattributesaddfunctionalityanddetails.1)Tagslike,,andoutlinethecontent'splacement.2)Attributessuchassrc,class,andstyleenhancetagsbyspecifyingimagesources,styling,andmore,improvingfunctionalityandappearance.

The Future of HTML: Evolution and TrendsMay 13, 2025 am 12:01 AM

The future of HTML will develop in a more semantic, functional and modular direction. 1) Semanticization will make the tag describe the content more clearly, improving SEO and barrier-free access. 2) Functionalization will introduce new elements and attributes to meet user needs. 3) Modularity will support component development and improve code reusability.

Why are HTML attributes important for web development?May 12, 2025 am 12:01 AM

HTMLattributesarecrucialinwebdevelopmentforcontrollingbehavior,appearance,andfunctionality.Theyenhanceinteractivity,accessibility,andSEO.Forexample,thesrcattributeintagsimpactsSEO,whileonclickintagsaddsinteractivity.Touseattributeseffectively:1)Usese

What is the purpose of the alt attribute? Why is it important?May 11, 2025 am 12:01 AM

The alt attribute is an important part of the tag in HTML and is used to provide alternative text for images. 1. When the image cannot be loaded, the text in the alt attribute will be displayed to improve the user experience. 2. Screen readers use the alt attribute to help visually impaired users understand the content of the picture. 3. Search engines index text in the alt attribute to improve the SEO ranking of web pages.

HTML, CSS, and JavaScript: Examples and Practical ApplicationsMay 09, 2025 am 12:01 AM

The roles of HTML, CSS and JavaScript in web development are: 1. HTML is used to build web page structure; 2. CSS is used to beautify the appearance of web pages; 3. JavaScript is used to achieve dynamic interaction. Through tags, styles and scripts, these three together build the core functions of modern web pages.

How do you set the lang attribute on the tag? Why is this important?May 08, 2025 am 12:03 AM

Setting the lang attributes of a tag is a key step in optimizing web accessibility and SEO. 1) Set the lang attribute in the tag, such as. 2) In multilingual content, set lang attributes for different language parts, such as. 3) Use language codes that comply with ISO639-1 standards, such as "en", "fr", "zh", etc. Correctly setting the lang attribute can improve the accessibility of web pages and search engine rankings.

What is the purpose of HTML attributes?May 07, 2025 am 12:01 AM

HTMLattributesareessentialforenhancingwebelements'functionalityandappearance.Theyaddinformationtodefinebehavior,appearance,andinteraction,makingwebsitesinteractive,responsive,andvisuallyappealing.Attributeslikesrc,href,class,type,anddisabledtransform

How do you create a list in HTML?May 06, 2025 am 12:01 AM

TocreatealistinHTML,useforunorderedlistsandfororderedlists:1)Forunorderedlists,wrapitemsinanduseforeachitem,renderingasabulletedlist.2)Fororderedlists,useandfornumberedlists,customizablewiththetypeattributefordifferentnumberingstyles.

See all articles

Hot AI Tools

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress images for free

Clothoff.io

AI clothes remover

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

How to fix KB5055612 fails to install in Windows 10?

4 weeks agoByDDD

Roblox: Grow A Garden - Complete Mutation Guide

3 weeks agoByDDD

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys

3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Mandragora: Whispers Of The Witch Tree - How To Unlock The Grappling Hook

3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Nordhold: Fusion System, Explained

3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),