Background Cover And Contain

Background-size property values include auto contain and cover. Image above credited to this site.

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If the background area is smaller than.

Background cover and contain. The first value is the horizontal size. The background-size property is specified in one of the following ways. Beware that this can alter the aspect ratio of the background image and lead to unexpected results.

Background-position also allows percentage values. We can do this purely through CSS thanks to the background-size property now in CSS3. Although the question assumes the reader already understands how the contain and cover values for background-size work heres a plain-English paraphrasing of what the spec says which can serve as a quick primer.

You can use percentage values as well. Using the keyword values contain or cover. Awesome Easy Progressive CSS3 Way.

Otherwise you can create separate classes with background images in the CSS file. This is the default value which stretches the image to fit the content box regardless of its aspect-ratio. Background-sizecover will cover the entire div with the image.

The first value is the horizontal position and the second value is the vertical. Increases or decreases the size of the image to fill the box whilst preserving its aspect-ratio. You can specify a size in pixels.

Object-fit can be set with one of these five values. Resizing background images with background-size. Admin December 24 2017 Leave a comment.

Using both a width and a height value in which case the first sets the width and the second sets the height. Scale the image while preserving its intrinsic aspect ratio if any to the smallest size such that both its width and its height can completely cover the background positioning area. For example a blog post excerpt background-sizecontain will.

Difference between background-sizecover and background-sizecontain. The background-size property specifies the size of the background images. The image will fill the height and width of its box once again.

This could be useful for showing thumbnail images of a main image where the entire image being displayed isnt that important but you still want to conform to a size for all images. The second is the vertical size. If you only specify one value the other value will be 50.

The background-size CSS property lets you resize the background image of an element overriding the default behavior of tiling the image at its full size by specifying the width andor height of the image. In addition to the default value auto there are two keywords you can use with background-size. We set a fixed and centered background on it then adjust its size using background-size set to the cover.

Home Html Difference between background-sizecover and background-sizecontain. Height and the multiple background. The right bottom corner is 100 100.

Visually I can appreciate the difference but in which situations should I prefer one over the other. The background-size CSS property allows developers to designate the size at which a background-image should appear within an element. Width of the image second value.

The keyword syntax auto cover and contain the one-value syntax sets the width of the image height becomes auto the two-value syntax first value. Contain ensures that the entire background image will fit the background area keeping its original aspect ratio. Therefore if you have background-size set BEFORE background then background will override your background.

The top left corner is 0 0. Cover tells the browser to make sure the image always covers the entire container even if it has to stretch the image or cut a little bit off one of the edges. The difference between cover and 100 100 is that the aspect ratio of the image is preserved so no unnatural stretching of the image occurs.

From the CSS Specification cover is defined to. You should try background-position. Both width and height are independent of each other however both interact with contain and cover.

Using a width value only in which case the height defaults to auto. By doing so you can scale the image upward or downward as desired. Just to explain why this solves the problem - the background property will automatically set default values for a range of other background properties like background-position background-size etc if you dont specify them in the background declaration.

Fixed and cover didnt use to play well together and you would have to put the height property in an outer container but I tested this code on Chrome Firefox Safari and Opera and it works fine. Well use the html element better than body as its always at least the height of the browser window. Cover makes the background image as large as possible such that it will fill the entire background area leaving no gaps.

There are four different syntaxes you can use with this property.

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