CSS background-image,CSS background-repeat,CSS background-attachment

 

CSS background-image

CSS background-image

The background-image property specifies an image to use as the background of an element.

By default, the image is repeated so it covers the entire element.

Example

Set the background image for a page: 

body {
  background-image: url("paper.gif");
}

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Example

This example shows a bad combination of text and background image. The text is hardly readable: 

body {
  background-image: url("bgdesert.jpg");
}

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Note: When using a background image, use an image that does not disturb the text.

The background image can also be set for specific elements, like the <p> element:

Example

p {
  background-image: url("paper.gif");
}

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CSS background-repeat

By default, the background-image property repeats an image both horizontally and vertically.

Some images should be repeated only horizontally or vertically, or they will look strange, like this:

Example

body {
  background-image: url("gradient_bg.png");
}

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If the image above is repeated only horizontally (background-repeat: repeat-x;), the background will look better:

Example

body {
  background-image: url("gradient_bg.png");
  background-repeat: repeat-x;
}

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Tip: To repeat an image vertically, set background-repeat: repeat-y;

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CSS background-repeat: no-repeat

Showing the background image only once is also specified by the background-repeat property:

Example

Show the background image only once:

body {
  background-image: url("img_tree.png");
  background-repeat: no-repeat;
}

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In the example above, the background image is placed in the same place as the text. We want to change the position of the image, so that it does not disturb the text too much.

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CSS background-position

The background-position property is used to specify the position of the background image.

Example

Position the background image in the top-right corner: 

body {
  background-image: url("img_tree.png");
  background-repeat: no-repeat;
  background-position: right top;
}

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CSS background-attachment

The background-attachment property specifies whether the background image should scroll or be fixed (will not scroll with the rest of the page):

Example

Specify that the background image should be fixed:

body {
  background-image: url("img_tree.png");
  background-repeat: no-repeat;
  background-position: right top;
  background-attachment: fixed;
}

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Example

Specify that the background image should scroll with the rest of the page:

body {
  background-image: url("img_tree.png");
  background-repeat: no-repeat;
  background-position: right top;
  background-attachment: scroll;
}

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To shorten the code, it is also possible to specify all the background properties in one single property. This is called a shorthand property.

Instead of writing:

body {
  background-color: #ffffff;
  background-image: url("img_tree.png");
  background-repeat: no-repeat;
  background-position: right top;
}

You can use the shorthand property background:

Example

Use the shorthand property to set the background properties in one declaration:

body {
  background: #ffffff url("img_tree.png") no-repeat right top;
}

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When using the shorthand property the order of the property values is:

• background-color
• background-image
• background-repeat
• background-attachment
• background-position

It does not matter if one of the property values is missing, as long as the other ones are in this order. Note that we do not use the background-attachment property in the examples above, as it does not have a value.