Background Cover And Contain

Object-fit can be set with one of these five values. Background-sizecover will cover the entire div with the image.

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The background-size property specifies the size of the background images.

Background cover and contain. For example a blog post excerpt background-sizecontain will. Beware that this can alter the aspect ratio of the background image and lead to unexpected results. 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. Background-size property values include auto contain and cover. Difference between background-sizecover and background-sizecontain.

The top left corner is 0 0. Background-position also allows percentage values. Well use the html element better than body as its always at least the height of the browser window.

Home Html Difference between background-sizecover and background-sizecontain. Both width and height are independent of each other however both interact with contain and cover. This is the default value which stretches the image to fit the content box regardless of its aspect-ratio.

Otherwise you can create separate classes with background images in the CSS file. Image above credited to this site. 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.

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

Height and the multiple background. The first value is the horizontal size. 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.

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. Using both a width and a height value in which case the first sets the width and the second sets the height. The image will fill the height and width of its box once again.

The right bottom corner is 100 100. 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. Contain ensures that the entire background image will fit the background area keeping its original aspect ratio. 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.

Awesome Easy Progressive CSS3 Way. Therefore if you have background-size set BEFORE background then background will override your background. In addition to the default value auto there are two keywords you can use with background-size.

If the background area is smaller than. Width of the image second value. Admin December 24 2017 Leave a comment.

The background-size property is specified in one of the following ways. The background-size CSS property allows developers to designate the size at which a background-image should appear within an element. You should try background-position.

Visually I can appreciate the difference but in which situations should I prefer one over the other. Resizing background images with background-size. If you only specify one value the other value will be 50.

We set a fixed and centered background on it then adjust its size using background-size set to the cover. 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. Cover makes the background image as large as possible such that it will fill the entire background area leaving no gaps.

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. The first value is the horizontal position and the second value is the vertical. 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. Using the keyword values contain or cover. There are four different syntaxes you can use with this property.

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.

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