Css load background images with

Как добавить изображение фоном. Свойство background-image

background-image позволяет добавить изображение в качестве фона для выбранного элемента. Фоновое изображение может быть любого типа и повторяться или масштабироваться в зависимости от настроек.

Значения

• url(‘путь_к_изображению’) — указывает путь к изображению. Вы можете указать относительный путь к изображению на вашем сервере или абсолютный URL для изображения в интернете.
• none — значение по умолчанию, где нет фона. Если не хотите использовать изображение в качестве фона, вы можете установить background-image: none; .
• linear-gradient() , radial-gradient() , repeating-linear-gradient() , repeating-radial-gradient() — создают градиент фона без использования изображений. Можно определить цветовую палитру и ориентацию градиента.

Повторное изображение

background-repeat: repeat; — значение по умолчанию, изображение повторяется по горизонтали и вертикали. Изображение будет заполнять фон элемента, повторяясь при необходимости.

background-repeat: repeat-x; — повторяется только по горизонтали.

background-repeat: repeat-y; — повторяется только по вертикали.

background-repeat: no-repeat; — отображается только один раз без повторения.

Размер изображения

background-size: auto; — отображается в своём естественном размере.

background-size: cover; — масштабируется так, чтобы полностью заполнить фон элемента, возможно, обрезая его.

background-size: contain; — масштабируется так, чтобы полностью поместиться в фон элемента без искажений. Белые полосы могут появиться по краям фона, если пропорции изображения и фона не совпадают.

Наследование

Свойство background-image не наследуется дочерними элементами. Каждый элемент должен самостоятельно задавать фоновое изображение.

Примеры использования

Добавление изображения на фон определённого элемента

Добавление повторяющегося изображения на фон элемента

Добавление градиента на фон

Нюансы использования

• Фоновые картинки не будут автоматически масштабироваться под размеры родительского элемента. Если размеры картинки и родительского элемента не совпадают, то картинка обрежется или начнёт повторяться.
• Если задать цвет фона и background-image для одного элемента, то картинка будет отображаться поверх цвета фона.

⭐ Поддержка браузерами свойства background-image

Материалы по теме

«Доктайп» — журнал о фронтенде. Читайте, слушайте и учитесь с нами.

Источник

background-image

The background-image CSS property sets one or more background images on an element.

Try it

The background images are drawn on stacking context layers on top of each other. The first layer specified is drawn as if it is closest to the user.

The borders of the element are then drawn on top of them, and the background-color is drawn beneath them. How the images are drawn relative to the box and its borders is defined by the background-clip and background-origin CSS properties.

If a specified image cannot be drawn (for example, when the file denoted by the specified URI cannot be loaded), browsers handle it as they would a none value.

Note: Even if the images are opaque and the color won’t be displayed in normal circumstances, web developers should always specify a background-color . If the images cannot be loaded—for instance, when the network is down—the background color will be used as a fallback.

Syntax

background-image: linear-gradient( to bottom, rgba(255, 255, 0, 0.5), rgba(0, 0, 255, 0.5) ), url("catfront.png"); /* Global values */ background-image: inherit; background-image: initial; background-image: revert; background-image: revert-layer; background-image: unset; 

Each background image is specified either as the keyword none or as an value.

To specify multiple background images, supply multiple values, separated by a comma.

Values

Is a keyword denoting the absence of images.

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.

Formal definition

Initial value	none
Applies to	all elements. It also applies to ::first-letter and ::first-line .
Inherited	no
Computed value	as specified, but with url() values made absolute
Animation type	discrete

Formal syntax

Examples

Layering background images

Note that the star image is partially transparent and is layered over the cat image.

HTML

div> p class="catsandstars">This paragraph is full of catsbr />and stars.p> p>This paragraph is not.p> p class="catsandstars">Here are more cats for you.br />Look at them!p> p>And no more.p> div> 

CSS

p  font-size: 1.5em; color: #fe7f88; background-image: none; background-color: transparent; > div  background-image: url("mdn_logo_only_color.png"); > .catsandstars  background-image: url("startransparent.gif"), url("catfront.png"); background-color: transparent; > 

Result

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Implementing image sprites in CSS
• Image-related data types: ,
• Image-related functions:
  • cross-fade()
  • element()
  • image()
  • image-set()
  • linear-gradient()
  • radial-gradient()
  • conic-gradient()
  • repeating-linear-gradient()
  • repeating-radial-gradient()
  • repeating-conic-gradient()
  • paint()
  • url()

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  Источник

  CSS background-image Property

  The background-image property sets one or more background images for an element.

  By default, a background-image is placed at the top-left corner of an element, and repeated both vertically and horizontally.

  Tip: The background of an element is the total size of the element, including padding and border (but not the margin).

  Tip: Always set a background-color to be used if the image is unavailable.

  Default value:	none
  Inherited:	no
  Animatable:	no. Read about animatable
  Version:	CSS1 + new values in CSS3
  JavaScript syntax:	object.style.backgroundImage=»url(img_tree.gif)» Try it

  Browser Support

  The numbers in the table specify the first browser version that fully supports the property.

  CSS Syntax

  Property Values

  Value	Description	Demo
  url(‘URL‘)	The URL to the image. To specify more than one image, separate the URLs with a comma	Demo ❯
  none	No background image will be displayed. This is default
  conic-gradient()	Sets a conic gradient as the background image. Define at least two colors	Demo ❯
  linear-gradient()	Sets a linear gradient as the background image. Define at least two colors (top to bottom)	Demo ❯
  radial-gradient()	Sets a radial gradient as the background image. Define at least two colors (center to edges)	Demo ❯
  repeating-conic-gradient()	Repeats a conic gradient	Demo ❯
  repeating-linear-gradient()	Repeats a linear gradient	Demo ❯
  repeating-radial-gradient()	Repeats a radial gradient	Demo ❯
  initial	Sets this property to its default value. Read about initial
  inherit	Inherits this property from its parent element. Read about inherit

  More Examples

  Example

  Sets two background images for the element. Let the first image appear only once (with no-repeat), and let the second image be repeated:

  body <
  background-image: url(«img_tree.gif»), url(«paper.gif»);
  background-repeat: no-repeat, repeat;
  background-color: #cccccc;
  >
  

  Example

  Use different background properties to create a «hero» image:

  .hero-image <
  background-image: url(«photographer.jpg»); /* The image used */
  background-color: #cccccc; /* Used if the image is unavailable */
  height: 500px; /* You must set a specified height */
  background-position: center; /* Center the image */
  background-repeat: no-repeat; /* Do not repeat the image */
  background-size: cover; /* Resize the background image to cover the entire container */
  >
  

  Example

  Sets a linear-gradient (two colors) as a background image for a element:

  Example

  Sets a linear-gradient (three colors) as a background image for a element:

  #grad1 <
  height: 200px;
  background-color: #cccccc;
  background-image: linear-gradient(red, yellow, green);
  >
  

  Example

  The repeating-linear-gradient() function is used to repeat linear gradients:

  #grad1 <
  height: 200px;
  background-color: #cccccc;
  background-image: repeating-linear-gradient(red, yellow 10%, green 20%);
  >
  

  Example

  Sets a radial-gradient (two colors) as a background image for a element:

  Example

  Sets a radial-gradient (three colors) as a background image for a element:

  #grad1 <
  height: 200px;
  background-color: #cccccc;
  background-image: radial-gradient(red, yellow, green);
  >
  

  Example

  The repeating-radial-gradient() function is used to repeat radial gradients:

  #grad1 <
  height: 200px;
  background-color: #cccccc;
  background-image: repeating-radial-gradient(red, yellow 10%, green 20%);
  >
  

  Источник

  CSS Background Image – How to Add an Image URL to Your Div

  

  Amy Haddad

  

  Say you want to put an image or two on a webpage. One way is to use the background-image CSS property.

  This property applies one or more background images to an element, like a , as the documentation explains. Use it for aesthetic reasons, such as adding a textured background to your webpage.

  Add an Image

  It’s easy to add an image using the background-image property. Just provide the path to the image in the url() value.

  The image path can be a URL, as shown in the example below:

  Or it can be a local path. Here’s an example:

  Add Multiple Images

  You can apply multiple images to the background-image property.

  That’s a lot of code. Let’s break it down.

  Separate each image url() value with a comma.

  background-image: url("https://amymhaddad.s3.amazonaws.com/morocco-blue.png"), url("https://amymhaddad.s3.amazonaws.com/oriental-tiles.png"); 

  Now position and enhance your images by applying additional properties.

  background-repeat: no-repeat, no-repeat; background-position: right, left; 

  There are several sub-properties you can add to your background images, such as background-repeat and background-position , which we used in the above example. You can even add gradients to a background image.

  See what it looks like when we put everything together.

  Order Matters

  The order that you list your images in matters because of the stacking order. That means the first image listed is nearest to the user, according to the documentation. Then, the next one, and the next, and so on.

  We’ve listed two images in the code above. The first image (morocco-blue.png) will be in front of the second (oriental-tiles.png). Both images are the same size and lack opacity, so we only see the first image.

  But if we move the second image (oriental-tiles.png) over to the right by 200 pixels, then you can see part of it (the rest remains hidden).

  Here’s what it looks like when we put everything together.

  When Should You Use Background Image?

  There’s a lot to like about the background-image property. But there’s a drawback.

  The image may not be accessible to all users, the documentation points out, like those who use screen readers.

  That’s because you can’t add textual information to the background-image property. As a result, the image will be missed by screen readers.

  Use the background-image property only when you need to add some decoration to your page. Otherwise, use the HTML element if an image has meaning or purpose, as the documentation notes.

  That way, you can add text to an image element, using the alt attribute, which describes the image. The provided text will be picked up by screen readers.

  Think of it this way: background-image is a CSS property, and CSS focuses on presentation or style; HTML focuses on semantics or meaning.

  When it comes to images, you’ve got options. If an image is needed for decoration, then the background-image property may be a good choice for you.

  I write about learning to program and the best ways to go about it (amymhaddad.com).

  Источник

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