CSS object-fit

The CSS object-fit property specifies how the contents of a replaced element should be fitted to the box established by its used height and width.

If the content does not completely fill the replaced element's content box, the unfilled space shows the replaced element's background. Since replaced elements always clip their contents to the content box, the content will never overflow.

What is a Replaced Element?

According to the CSS specification, a replaced element is an element whose content is outside the scope of the CSS formatting model, such as an image, embedded document, or applet.

According to the HTML specification the following elements are replaced elements:

• audio
• canvas
• embed
• iframe
• img
• input
• object
• video

Syntax

Where <value> is one of the values below.

Possible Values

Here are the possible values for this property:

fill

Specifies that the replaced content is sized to fill the element's content box.

contain

Specifies that the replaced content is sized to maintain its aspect ratio while fitting within the element's content box.

cover

Specifies that the replaced content is sized to maintain its aspect ratio while filling the element's entire content box.

none

Specifies that the replaced content is not resized to fit inside the element's content box. The content's intrinsic aspect ratio is maintained.

scale-down

Specifies that the content is sized as if none or contain were specified, whichever would result in a smaller concrete object size.

In addition, all CSS properties also accept the following CSS-wide keyword values as the sole component of their property value:

initial

Represents the value specified as the property's initial value.

inherit

Represents the computed value of the property on the element's parent.

unset

This value acts as either inherit or initial, depending on whether the property is inherited or not. In other words, it sets all properties to their parent value if they are inheritable or to their initial value if not inheritable.

Examples

Here are examples to show the effect of each of these values.

object-fit: fill

object-fit: contain

object-fit: cover

object-fit: none

object-fit: scale-down

Basic Property Information

CSS Specifications

The object-fit property is defined in CSS Images Module Level 3.

Browser Support

Browser support for CSS properties can vary, particularly for newer or experimental features. Check current browser compatibility before using a property in production, especially when supporting older browsers.

The following table provided by Caniuse.com shows the level of browser support for this feature.

Initial Value

CSS properties have an initial value that applies when the property has not been explicitly set. The initial value is different from the value inherited from a parent element and may vary between properties.

Inheritance

Some CSS properties inherit their computed value from their parent element by default, while others do not. The inherit, initial, unset, and revert keywords can also be used to control how a property gets its value.

Vendor Prefixes

Most modern CSS properties use the standard, unprefixed syntax. Vendor-prefixed properties such as -webkit- are mainly relevant to older browser versions or specific features and should only be used when required by your browser support targets.