object-fit - CSS: Cascading Style Sheets 编辑

The object-fit CSS property sets how the content of a replaced element, such as an <img> or <video>, should be resized to fit its container.

You can alter the alignment of the replaced element's content object within the element's box using the object-position property.

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Syntax

The object-fit property is specified as a single keyword chosen from the list of values below.

Values

contain

The replaced content is scaled to maintain its aspect ratio while fitting within the element’s content box. The entire object is made to fill the box, while preserving its aspect ratio, so the object will be "letterboxed" if its aspect ratio does not match the aspect ratio of the box.

cover

The replaced content is sized to maintain its aspect ratio while filling the element’s entire content box. If the object's aspect ratio does not match the aspect ratio of its box, then the object will be clipped to fit.

fill

The replaced content is sized to fill the element’s content box. The entire object will completely fill the box. If the object's aspect ratio does not match the aspect ratio of its box, then the object will be stretched to fit.

none

The replaced content is not resized.

scale-down

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

Formal definition

Formal syntax

fill | contain | cover | none | scale-down

Examples

Setting object-fit for an image

HTML

<section>
  <h2>object-fit: fill</h2>
  <img class="fill" src="https://www.wenjiangs.com/wp-content/uploads/2020/mozilla/mdn_logo_only_color.png" alt="MDN Logo">

  <img class="fill narrow" src="https://www.wenjiangs.com/wp-content/uploads/2020/mozilla/mdn_logo_only_color.png" alt="MDN Logo">

  <h2>object-fit: contain</h2>
  <img class="contain" src="https://www.wenjiangs.com/wp-content/uploads/2020/mozilla/mdn_logo_only_color.png" alt="MDN Logo">

  <img class="contain narrow" src="https://www.wenjiangs.com/wp-content/uploads/2020/mozilla/mdn_logo_only_color.png" alt="MDN Logo">

  <h2>object-fit: cover</h2>
  <img class="cover" src="https://www.wenjiangs.com/wp-content/uploads/2020/mozilla/mdn_logo_only_color.png" alt="MDN Logo">

  <img class="cover narrow" src="https://www.wenjiangs.com/wp-content/uploads/2020/mozilla/mdn_logo_only_color.png" alt="MDN Logo">

  <h2>object-fit: none</h2>
  <img class="none" src="https://www.wenjiangs.com/wp-content/uploads/2020/mozilla/mdn_logo_only_color.png" alt="MDN Logo">

  <img class="none narrow" src="https://www.wenjiangs.com/wp-content/uploads/2020/mozilla/mdn_logo_only_color.png" alt="MDN Logo">

  <h2>object-fit: scale-down</h2>
  <img class="scale-down" src="https://www.wenjiangs.com/wp-content/uploads/2020/mozilla/mdn_logo_only_color.png" alt="MDN Logo">

  <img class="scale-down narrow" src="https://www.wenjiangs.com/wp-content/uploads/2020/mozilla/mdn_logo_only_color.png" alt="MDN Logo">
</section>

CSS

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;
  margin: 10px 0;
}

.narrow {
  width: 100px;
  height: 150px;
}

.fill {
  object-fit: fill;
}

.contain {
  object-fit: contain;
}

.cover {
  object-fit: cover;
}

.none {
  object-fit: none;
}

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

Result

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Other image-related CSS properties: object-position, image-orientation, image-rendering, image-resolution.
• background-size