object-fit

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

物件契合(**object-fit)**CSS 屬性能指定置換元素(replaced element)的內容要如何契合、安裝到其使用的高度和寬度已確定的框。

預設值 (en-US)fill
Applies toreplaced elements
繼承與否no
Computed value (en-US)as specified
Animation typediscrete

Syntax

/* Keyword values */
object-fit: fill;
object-fit: contain;
object-fit: cover;
object-fit: none;
object-fit: scale-down;

/* Global values */
object-fit: inherit;
object-fit: initial;
object-fit: unset;

Values

fill

The replaced content is sized to fill the element’s content box: the object’s concrete object size is the element’s used width and height.

contain

The replaced content is sized to maintain its aspect ratio while fitting within the element’s content box: its concrete object size is resolved as a contain constraint against the element’s used width and height.

cover

The replaced content is sized to maintain its aspect ratio while filling the element’s entire content box: its concrete object size is resolved as a cover constraint against the element’s used width and height.

none

The replaced content is not resized to fit inside the element’s content box: the object’s concrete object size is determined using the default sizing algorithm with no specified size, and a default object size equal to the replaced element’s used width and height.

scale-down

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

Formal syntax

object-fit = 
  fill        | (en-US)
  contain     | (en-US)
  cover       | (en-US)
  none        | (en-US)
  scale-down

Example

HTML Content

<div>
  <h2>object-fit: fill</h2>
  <img src="mdn_logo_only_color.png" alt="MDN Logo" class="fill" />

  <img src="mdn_logo_only_color.png" alt="MDN Logo" class="fill narrow" />

  <h2>object-fit: contain</h2>
  <img src="mdn_logo_only_color.png" alt="MDN Logo" class="contain" />

  <img src="mdn_logo_only_color.png" alt="MDN Logo" class="contain narrow" />

  <h2>object-fit: cover</h2>
  <img src="mdn_logo_only_color.png" alt="MDN Logo" class="cover" />

  <img src="mdn_logo_only_color.png" alt="MDN Logo" class="cover narrow" />

  <h2>object-fit: none</h2>
  <img src="mdn_logo_only_color.png" alt="MDN Logo" class="none" />

  <img src="mdn_logo_only_color.png" alt="MDN Logo" class="none narrow" />

  <h2>object-fit: scale-down</h2>
  <img src="mdn_logo_only_color.png" alt="MDN Logo" class="scale-down" />

  <img src="mdn_logo_only_color.png" alt="MDN Logo" class="scale-down narrow" />
</div>

CSS Content

h2 {
  font-family: Courier New, monospace;
  font-size: 1em;
  margin: 1em 0 0.3em;
}

div {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  align-items: flex-start;
  height: 940px;
}

img {
  width: 150px;
  height: 100px;
  border: 1px solid #000;
}

.narrow {
  width: 100px;
  height: 150px;
  margin-top: 10px;
}

.fill {
  object-fit: fill;
}

.contain {
  object-fit: contain;
}

.cover {
  object-fit: cover;
}

.none {
  object-fit: none;
}

.scale-down {
  object-fit: scale-down;
}

Output

Specifications

Specification
CSS Images Module Level 3
# the-object-fit

Browser compatibility

BCD tables only load in the browser

See also