HTMLImageElement: naturalWidth property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The read-only naturalWidth property of the HTMLImageElement interface returns the intrinsic (natural), density-corrected width of the image in CSS pixels.
This is the width the image is if drawn with nothing constraining its width; if you neither specify a width for the image nor place the image inside a container that limits or expressly specifies the image width, it will be rendered this wide.
Note:
Most of the time the natural width is the actual width of the image sent by the server. Nevertheless, browsers can modify an image before pushing it to the renderer. For example, Chrome degrades the resolution of images on low-end devices. In such cases, naturalWidth will consider the width of the image modified by such browser interventions as the natural width, and returns this value.
Value
An integer value indicating the intrinsic width of the image, in CSS pixels. This is the width at which the image is naturally drawn when no constraint or specific value is established for the image. This natural width is corrected for the pixel density of the device on which it's being presented, unlike width.
If the intrinsic width is not available—either because the image does not specify an intrinsic width or because the image data is not available in order to obtain this information, naturalWidth returns 0.
Examples
See HTMLImageElement.naturalHeight for example code that displays an image in both its natural "density-adjusted" size, and in its rendered size as altered by the page's CSS and other factors.
Specifications
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| HTML # dom-img-naturalwidth-dev |
Browser compatibility
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naturalWidth
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