CSS Multiple Backgrounds

Guest · Post by **Guest** » Fri Oct 27, 2023 8:24 am

CSS Multiple Backgrounds

In this chapter you will learn how to add multiple background images to one
element.
You will also learn about the following properties:

background-size
background-origin
background-clip

CSS Multiple Backgrounds
CSS allows you to add multiple background images for an element, through the
background-image property.
The different background images are separated by commas, and the images are
stacked on top of each other, where the first image is closest to the viewer.
The following example has two background images, the first image is a flower
(aligned to the bottom and right) and the second image is a paper background (aligned to the top-left corner):

Example

#example1 {  background-image: url(img_flwr.gif), url(paper.gif);  background-position: right bottom, left top;  background-repeat: no-repeat, repeat;}
Try it Yourself »

Multiple background images can be specified using either the individual
background properties (as above) or the background shorthand property.
The following example uses the background shorthand property (same result as
example above):

Example

#example1 {  background: url(img_flwr.gif) right bottom
no-repeat, url(paper.gif) left top repeat;}
Try it Yourself »

CSS Background Size
The CSS background-size property allows you to specify the size of background images.
The size can be specified in lengths, percentages, or by using one of the two
keywords: contain or cover.
The following example resizes a background image to much smaller than the original image (using pixels):

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Here is the code:

Example

#div1
{

background: url(img_flower.jpg);
  background-size: 100px 80px;  background-repeat: no-repeat;
}

Try it Yourself »

The two other possible values for background-size are contain
and cover.
The contain keyword scales the background image to be as large as possible
(but both its width and its height must fit inside the content area). As such, depending on the proportions of the background
image and the background positioning area, there may be some areas of
the background which are not covered by the background image.
The cover keyword scales the background image so that the content area is
completely covered by the background image (both its width and height are equal to or
exceed the content area). As such, some parts of the background image may not be
visible in the background positioning area.
The following example illustrates the use of contain and cover:

Example

#div1
{

background: url(img_flower.jpg);

background-size: contain;  background-repeat: no-repeat;
}#div2
{

background: url(img_flower.jpg);

background-size: cover;
background-repeat: no-repeat;
}

Try it Yourself »

Define Sizes of Multiple Background Images
The background-size property also accepts multiple values for background size
(using a comma-separated list), when working with multiple backgrounds.
The following example has three background images specified, with different
background-size value for each image:

Example

#example1 { background: url(img_tree.gif) left top
no-repeat, url(img_flwr.gif) right bottom no-repeat, url(paper.gif) left top
repeat; background-size: 50px, 130px, auto;}
Try it Yourself »

Full Size Background Image
Now we want to have a background image on a website that covers the entire
browser window at all times.
The requirements are as follows:

Fill the entire page with the image (no white space)
Scale image as needed
Center image on page
Do not cause scrollbars

The following example shows how to do it; Use the <html> element
(the <html> element is always at least the height of the browser window). Then set a fixed and centered background on it.
Then adjust its size with the
background-size property:

Example

html {  background: url(img_man.jpg) no-repeat
center fixed;   background-size: cover;}
Try it Yourself »

Hero Image
You could also use different background properties on a <div> to create a hero image (a large image with text), and place it where you want.

Example

.hero-image { background: url(img_man.jpg) no-repeat center;
background-size: cover; height: 500px; position:
relative;}
Try it Yourself »

CSS background-origin Property
The CSS background-origin property specifies where the background image is
positioned.
The property takes three different values:

border-box - the background image starts from the upper left corner of the border
padding-box - (default) the background image starts from the upper left corner of the padding edge
content-box - the background image starts from the upper left corner of the content

The following example illustrates the background-origin property:

Example

#example1
{
border: 10px solid black; padding: 35px; background: url(img_flwr.gif);

background-repeat: no-repeat;
background-origin: content-box;}

Try it Yourself »

CSS background-clip Property
The CSS background-clip property specifies the painting area of the background.
The property takes three different values:

border-box - (default) the background is painted to the outside edge of the border
padding-box - the background is painted to the outside edge of the padding
content-box - the background is painted within the content box

The following example illustrates the background-clip property:

Example

#example1
{
border: 10px dotted black;
padding: 35px; background: yellow;
background-clip: content-box;}

Try it Yourself »

Test Yourself With Exercises

Exercise:
Add two background images to the <body> element.
img1.gif and img2.gif.
Make sure that img2.gif is displayed on top of img1.gif.

<style>
body {
background-image: ;
}
</style>

<body>
<h1>This is a heading</h1>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
</body>

Submit Answer »
Start the Exercise

CSS Advanced Background Properties

Property
Description

background
A shorthand property for setting all the background properties in one declaration

background-clip
Specifies the painting area of the background

background-image
Specifies one or more background images for an element

background-origin
Specifies where the background image(s) is/are positioned

background-size
Specifies the size of the background image(s)

★
+1

Reference: https://www.w3schools.com/css/css3_backgrounds.asp