Здесь можно что-то разместить



    Здесь можно что-то разместить



    Img Css3


    Img css3

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    The CSS data type represents a two-dimensional image. There are two kinds of images: plain images, referenced with a , and dynamically-generated images, generated with or element(). Additional CSS image functions include image(), image-set(), and cross-fade(). Images can be used with numerous CSS properties, such as background-image, border-image, content, cursor, and list-style-image.

    Image types

    CSS can handle the following kinds of images:

    • Images with intrinsic dimensions (a natural size), like a JPEG, PNG, or other raster format.
    • Images with multiple intrinsic dimensions, existing in multiple versions inside a single file, like some .ico formats. (In this case, the intrinsic dimensions will be those of the image largest in area and the aspect ratio most similar to the containing box.)
    • Images with no intrinsic dimensions but with an intrinsic aspect ratio between its width and height, like an SVG or other vector format.
    • Images with neither intrinsic dimensions, nor an intrinsic aspect ratio, like a CSS gradient.

    CSS determines an object's concrete size using (1) its intrinsic dimensions; (2) its specified size, defined by CSS properties like width, height, or background-size; and (3) its default size, determined by the kind of property the image is used with:

    Kind of Object (CSS Property) Default object size background-image The size of the element's background positioning area list-style-image The size of a 1em character border-image-source The size of the element's border image area cursor The browser-defined size matching the usual cursor size on the client's system mask-image ? shape-outside ? mask-border-source ? symbols for @counter-style At risk feature. If supported, the browser-defined size matching the usual cursor size on the client's system content for a pseudo-element (::after/::before) A 300px × 150px rectangle

    The concrete object size is calculated using the following algorithm:

    • If the specified size defines both the width and the height, these values are used as the concrete object size.
    • If the specified size defines only the width or only the height, the missing value is determined using the intrinsic ratio, if there is any, the intrinsic dimensions if the specified value matches, or the default object size for that missing value.
    • If the specified size defines neither the width nor the height, the concrete object size is calculated so that it matches the intrinsic aspect ratio of the image but without exceeding the default object size in any dimension. If the image has no intrinsic aspect ratio, the intrinsic aspect ratio of the object it applies to is used; if this object has none, the missing width or height are taken from the default object size.
    Note: Not all browsers support every type of image on every property. See the browser compatibility section for details.

    Syntax

    The data type can be represented with any of the following:

    • An image denoted by the data type
    • A data type
    • A part of the webpage, defined by the element() function
    • An image, image fragment or solid patch of color, defined by the image() function
    • A blending of two or more images defined by the cross-fade() function.
    • A selection of images chosed based on resolution defined by the image-set() function.

    Examples

    Valid images

    url(test.jpg)               /* A , as long as test.jpg is an actual image */
    linear-gradient(blue, red)  /* A  */
    element(#realid)            /* A part of the webpage, referenced with the element() function,
                                   if "realid" is an existing ID on the page */ 
    image(ltr 'arrow.png#xywh=0,0,16,16', red) 
                                /* A section 16x16 section of , starting from the top, left of the original
                                   image as long as arrow.png is a supported image, otherwise a solid 
                                   red swatch. If language is rtl, the image will be horizontally flipped. */ 
    cross-fade(20% url(twenty.png), url(eighty.png)) 
                                /* cross faded images, with twenty being 20% opaque 
                                   and eighty being 80% opaque. */ 
    image-set('test.jpg' 1x, 'test-2x.jpg' 2x)  
                                /* a selection of images with varying resolutions */

    Invalid images

    nourl.jpg            /* An image file must be defined using the url() function. */
    url(report.pdf)      /* A file pointed to by the url() function must be an image. */
    element(#fakeid)     /* An element ID must be an existing ID on the page. */ 
    image(z.jpg#xy=0,0)  /* The spatial fragment must be written in the format of xywh=#,#,#,# */
    image-set('cat.jpg' 1x, 'dog.jpg' 1x) /* every image in an image set must have a different resolutions */
    

    Accessibility concerns

    Browsers do not provide any special information on background images to assistive technology. This is important primarily for screen readers, as a screen reader will not announce its presence and therefore convey nothing to its users. If the image contains information critical to understanding the page's overall purpose, it is better to describe it semantically in the document.

    • MDN Understanding WCAG, Guideline 1.1 explanations
    • Understanding Success Criterion 1.1.1 | W3C Understanding WCAG 2.0

    Specifications

    Specification Status Comment CSS Images Module Level 4The definition of '' in that specification. Working Draft Adds element(), image(), image-set(), conic-gradient(), repeating-conic-gradient(), and image-resolution. CSS Images Module Level 3The definition of '' in that specification. Candidate Recommendation Initial definition. Before this, there was no explicitly defined data type. Images could only be defined using the url() functional notation.

    Browser compatibility

    The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. Update compatibility data on GitHubDesktopMobileChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 10Opera Full support 2Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 11Safari iOS Full support 1Samsung Internet Android Full support 1.0cross-fade() ExperimentalChrome Full support 17Prefixed Notes
    Full support 17Prefixed Notes
    Prefixed Implemented with the vendor prefix: -webkit-
    Notes Supports the original dual-image with percentage implementation only.
    Edge No support NoFirefox No support NoIE No support NoOpera Full support 15Prefixed Notes
    Full support 15Prefixed Notes
    Prefixed Implemented with the vendor prefix: -webkit-
    Notes Supports the original dual-image with percentage implementation only.
    Safari Full support 10Notes
    Full support 10Notes
    Notes Supports the original dual-image with percentage implementation only.
    Full support 5.1Prefixed Notes
    Prefixed Implemented with the vendor prefix: -webkit-
    Notes Supports the original dual-image with percentage implementation only.
    WebView Android Full support ≤37Prefixed Notes
    Full support ≤37Prefixed Notes
    Prefixed Implemented with the vendor prefix: -webkit-
    Notes Supports the original dual-image with percentage implementation only.
    Chrome Android Full support 18Prefixed Notes
    Full support 18Prefixed Notes
    Prefixed Implemented with the vendor prefix: -webkit-
    Notes Supports the original dual-image with percentage implementation only.
    Firefox Android No support NoOpera Android Full support 14Prefixed Notes
    Full support 14Prefixed Notes
    Prefixed Implemented with the vendor prefix: -webkit-
    Notes Supports the original dual-image with percentage implementation only.
    Safari iOS Full support 9.3Notes
    Full support 9.3Notes
    Notes Support for the original dual-image with percentage implementation only.
    Full support 5Prefixed Notes
    Prefixed Implemented with the vendor prefix: -webkit-
    Notes Supports the original dual-image with percentage implementation only.
    Samsung Internet Android Full support YesPrefixed Notes
    Full support YesPrefixed Notes
    Prefixed Implemented with the vendor prefix: -webkit-
    Notes Support for the original dual-image with percentage implementation only.
    element() ExperimentalChrome No support NoEdge No support NoFirefox Full support 57Prefixed
    Full support 57Prefixed
    Prefixed Implemented with the vendor prefix: -moz-
    No support 29 — 57Prefixed Notes
    Prefixed Implemented with the vendor prefix: -moz-
    Notes -moz-element() is limited to background-image, background, border-image and border-image-source.
    No support 4 — 29Prefixed Notes
    Prefixed Implemented with the vendor prefix: -moz-
    Notes -moz-element() is limited to background-image and background.
    IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoFirefox Android Full support 60Prefixed
    Full support 60Prefixed
    Prefixed Implemented with the vendor prefix: -moz-
    No support 29 — 60Prefixed Notes
    Prefixed Implemented with the vendor prefix: -moz-
    Notes -moz-element() is limited to background-image, background, border-image and border-image-source.
    No support 4 — 29Prefixed Notes
    Prefixed Implemented with the vendor prefix: -moz-
    Notes -moz-element() is limited to background-image and background.
    Opera Android No support NoSafari iOS No support NoSamsung Internet Android No support NoChrome Full support 26
    Full support 26
    Full support 10Prefixed
    Prefixed Implemented with the vendor prefix: -webkit-
    Edge Full support 12Prefixed
    Full support 12Prefixed
    Prefixed Implemented with the vendor prefix: -ms-
    Firefox Full support 3.6Notes
    Full support 3.6Notes
    Notes Gradients are limited to background-image, border-image, and mask-image.
    IE Full support 10Prefixed
    Full support 10Prefixed
    Prefixed Implemented with the vendor prefix: -ms-
    Opera Full support 12.1
    Full support 12.1
    No support 11 — 15Prefixed
    Prefixed Implemented with the vendor prefix: -o-
    Full support 15Prefixed
    Prefixed Implemented with the vendor prefix: -webkit-
    Safari Full support 6.1
    Full support 6.1
    Full support 5.1Prefixed
    Prefixed Implemented with the vendor prefix: -webkit-
    WebView Android Full support ≤37
    Full support ≤37
    Full support ≤37Prefixed
    Prefixed Implemented with the vendor prefix: -webkit-
    Chrome Android Full support 26
    Full support 26
    Full support 18Prefixed
    Prefixed Implemented with the vendor prefix: -webkit-
    Firefox Android Full support 4Notes
    Full support 4Notes
    Notes Gradients are limited to background-image, border-image, and mask-image.
    Opera Android Full support 12.1
    Full support 12.1
    No support 11 — 14Prefixed
    Prefixed Implemented with the vendor prefix: -o-
    Full support 14Prefixed
    Prefixed Implemented with the vendor prefix: -webkit-
    Safari iOS Full support 7
    Full support 7
    Full support 6Prefixed
    Prefixed Implemented with the vendor prefix: -webkit-
    Samsung Internet Android Full support Yesimage() ExperimentalChrome No support NoEdge No support NoFirefox No support NoNotes
    No support NoNotes
    Notes The -moz-image-rect() function supports fragments as of Firefox 4.
    IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoFirefox Android No support NoNotes
    No support NoNotes
    Notes The -moz-image-rect() function supports fragments as of Firefox 4.
    Opera Android No support NoSafari iOS No support NoSamsung Internet Android No support Noimage-set() ExperimentalChrome Full support 21Prefixed
    Full support 21Prefixed
    Prefixed Implemented with the vendor prefix: -webkit-
    Edge No support NoFirefox No support NoNotes
    No support NoNotes
    Notes See bug 1107646.
    IE No support NoOpera Full support 15Prefixed
    Full support 15Prefixed
    Prefixed Implemented with the vendor prefix: -webkit-
    Safari Partial support 6Prefixed Notes
    Partial support 6Prefixed Notes
    Prefixed Implemented with the vendor prefix: -webkit-
    Notes Support for url images only and x is the only supported resolution unit. See bug 160934.
    WebView Android Full support 4.4Prefixed
    Full support 4.4Prefixed
    Prefixed Implemented with the vendor prefix: -webkit-
    Chrome Android Full support 25Prefixed
    Full support 25Prefixed
    Prefixed Implemented with the vendor prefix: -webkit-
    Firefox Android No support NoNotes
    No support NoNotes
    Notes See bug 1107646.
    Opera Android Full support 14Prefixed
    Full support 14Prefixed
    Prefixed Implemented with the vendor prefix: -webkit-
    Safari iOS Partial support 6Prefixed Notes
    Partial support 6Prefixed Notes
    Prefixed Implemented with the vendor prefix: -webkit-
    Notes Support for url images only and x is the only supported resolution unit. See bug 160934.
    Samsung Internet Android Full support 4.0Prefixed
    Full support 4.0Prefixed
    Prefixed Implemented with the vendor prefix: -webkit-

    Legend

    Full support  
    Full support
    Partial support  
    Partial support
    No support  
    No support
    Experimental. Expect behavior to change in the future.
    Experimental. Expect behavior to change in the future.
    See implementation notes.
    See implementation notes.
    Requires a vendor prefix or different name for use.
    Requires a vendor prefix or different name for use.

    See also

    • element()
    • image()
    • image-set()
    • cross-fade()

    Css3 img size, Css3 img cover, Css img center, Css3 image filter, Image hover css, Css3 img src,



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