W3C中文教程
全球最大最新的中文 Web 技术教程
HTML CSS SQL PHP COLORS MYSQL BOOTSTRAP
×

CSS 参考手册

CSS 参考手册 CSS 选择器 CSS 函数参考手册 CSS 听觉参考手册 CSS Web安全字体 CSS 动画 CSS 单位 CSS 颜色 CSS3 浏览器支持

CSS 属性

align-content align-items align-self all animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position background-repeat background-size border border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-collapse border-color border-image border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-left border-left-color border-left-style border-left-width border-radius border-right border-right-color border-right-style border-right-width border-spacing border-style border-top border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-width bottom box-shadow box-sizing caption-side clear clip color column-count column-fill column-gap column-rule column-rule-color column-rule-style column-rule-width column-span column-width columns content counter-increment counter-reset cursor direction display empty-cells filter flex flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap float font @font-face font-family font-size font-size-adjust font-stretch font-style font-variant font-weight hanging-punctuation height justify-content @keyframes left letter-spacing line-height list-style list-style-image list-style-position list-style-type margin margin-bottom margin-left margin-right margin-top max-height max-width @media min-height min-width nav-down nav-index nav-left nav-right nav-up opacity order outline outline-color outline-offset outline-style outline-width overflow overflow-x overflow-y padding padding-bottom padding-left padding-right padding-top page-break-after page-break-before page-break-inside perspective perspective-origin position quotes resize right tab-size table-layout text-align text-align-last text-decoration text-decoration-color text-decoration-line text-decoration-style text-indent text-justify text-overflow text-shadow text-transform top transform transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function unicode-bidi vertical-align visibility white-space width word-break word-spacing word-wrap z-index

 

CSS3 @media Rule



Example

Change the background-color if the viewport is 480 pixels wide or wider:

@media screen and (min-width: 480px) {
    body {
       background-color: lightgreen;
    }
}
尝试一下 »

More "尝试一下" examples below.


定义及用法

The @media rule is used to define different style rules for different media types/devices.

In CSS2 this was called media types, while in CSS3 it is called mediaqueries.

Media queries look at the capability of the device, and can be used to check many things, such as:

  • width and height of the viewport
  • width and height of the device
  • orientation (is the tablet/phone in landscape or portrait mode?)
  • resolution
  • and much more

浏览器支持

The numbers in the table specifies the first browser version that fully supports the @media rule.

属性
@media211293.54.09

CSS 语法

@media not|only mediatype and (media feature) {
   CSS-Code;
}

You can also have different stylesheets for different media:

<link rel="stylesheet" media="mediatype and|not|only (mediafeature)"href="mystylesheet.css">

Media Types

描述
allUsed for all media type devices
auralDeprecated. Used for speech and sound synthesizers
brailleDeprecated. Used for braille tactile feedback devices
embossedDeprecated. Used for paged braille printers
handheldDeprecated. Used for small or handheld devices
printUsed for printers
projectionDeprecated. Used for projected presentations, like slides
screenUsed for computer screens, tablets, smart-phones etc.
speechUsed for screenreaders that "reads" the page out loud
ttyDeprecated. Used for media using a fixed-pitch character grid, like teletypes and terminals
tvDeprecated. Used for television-type devices

Media Features

描述
aspect-ratioThe ratio between the width and the height of the viewport
colorThe number of bits per color component for the output device
color-indexThe number of colors the device can display
device-aspect-ratioThe ratio between the width and the height of the device
device-heightThe height of the device, such as a computer screen
device-widthThe width of the device, such as a computer screen
gridWhether the device is a grid or bitmap
heightThe viewport height
max-aspect-ratioThe maximum ratio between the width and the height of thedisplay area
max-colorThe maximum number of bits per color component for the output device
max-color-indexThe maximum number of colors the device can display
max-device-aspect-ratioThe maximum ratio between the width and the height of thedevice
max-device-heightThe maximum height of the device, such as a computer screen
max-device-widthThe maximum width of the device, such as a computer screen
max-heightThe maximum height of the display area, such as a browserwindow
max-monochromeThe maximum number of bits per "color" on a monochrome (greyscale) device
max-resolutionThe maximum resolution of the device, using dpi or dpcm
max-widthThe maximum width of the display area, such as a browserwindow
min-aspect-ratioThe minimum ratio between the width and the height of thedisplay area
min-colorThe minimum number of bits per color component for the output device
min-color-indexThe minimum number of colors the device can display
min-device-aspect-ratioThe minimum ratio between the width and the height of thedevice
min-device-widthThe minimum width of the device, such as a computer screen
min-device-heightThe minimum height of the device, such as a computer screen
min-heightThe minimum height of the display area, such as a browserwindow
min-monochromeThe minimum number of bits per "color" on a monochrome (greyscale) device
min-resolutionThe minimum resolution of the device, using dpi or dpcm
min-widthThe minimum width of the display area, such as a browserwindow
monochromeThe number of bits per "color" on a monochrome (greyscale) device
orientationThe orientation of the viewport (landscape or portrait mode)
overflow-blockHow does the output device handle content that overflows the viewportalong the block axis (added in Media Queries Level 4)
overflow-inlineCan content that overflows the viewport along the inline axis bescrolled (added in Media Queries Level 4)
resolutionThe resolution of the output device, using dpi or dpcm
scanThe scanning process of the output device
update-frequencyHow quickly can the output device modify the appearance of the content(added in Media Queries Level 4)
widthThe viewport width

Examples

更多实例

Example

Use the @media rule to make responsive design:

@media only screen and (max-width: 500px) {
    .gridmenu{
        width:100%;
    }

    .gridmain{
        width:100%;
   }

    .gridright {
       width:100%;
    }
}
尝试一下 »

相关文章

CSS 教程:CSS Media Types