How Do I Stretch or Scale a CSS Background Image to Fit Its Container?

How to Stretch or Scale a CSS Background to Fit Its Container

When setting a background image in CSS, you may desire it to fit perfectly within the container's dimensions or stretch to cover the entire area. CSS offers a straightforward solution to achieve this effect.

Solution: Use the background-size Property

CSS3 introduced the background-size property, which allows you to specify the size and scaling of background images. To stretch or scale a background to fill its container, use the following syntax:

#my_container {
    background-size: 100% auto; /* width and height, can be %, px or other units */
}

The 100% value indicates that the background will stretch to the full width of its container, while the auto value allows the height to adjust automatically to preserve the original aspect ratio of the image.

Compatibility

This solution is supported by modern browsers since 2012, including Chrome, Firefox, Safari, and Edge. For older browsers, you may consider using vendor prefixes, such as -webkit or -moz, to ensure compatibility.

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