Is it possible to modify the background height dynamically through CSS?

I'm attempting to dynamically adjust the height of my background in CSS. Currently, I have a fixed background that remains in place as I scroll down the page. However, when using a taller browser window, there appears to be a gap beneath the background image. My current CSS code is as follows:

body {
    min-width: 100%;
    background-image: url("Photos/Tiger-4.jpg");
    background-position: 0px 0px;
    background-size: 100%;
    background-attachment: fixed;
    background-repeat: no-repeat;
}

Desired Background Look [Img]

Current Background Appearance on Tall Browser [Img]

In the second image provided, you can see the undesired white gap under the background. My goal is for the background to zoom in on the image instead in order to enhance its display on mobile devices. Essentially, I want the background height to match the window height and the width to adjust proportionally without distorting the image.

I've attempted to resolve this issue by using:

background-size: auto 100%;

However, this resulted in an excessively large background image.

Any assistance would be greatly appreciated :)

htmlcssweb

Answer №1

Check out this demonstration that showcases a similar solution. By utilizing the vh (view height) unit and setting the background-size to cover, you should be able to resolve your issue. For more detailed information, you can refer to this informative article.

div {
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    background-attachment: fixed;
    height: 90vh; // Adjust as needed
}

Answer №2

To incorporate the vh measurement into your code, follow this example:

div{height: 100vh;
background-image: url("http://e03-elmundo.uecdn.es/assets/multimedia/imagenes/2015/11/13/14474300157302.jpg")
}
<div>
<p>
My text
</p>
</div>

However, keep in mind that this is just one approach. If it doesn't work for you, consider setting the body and html tag heights to 100% for a similar outcome.

Alternatively, you can use JavaScript to determine the screen height and adjust the size of your elements accordingly.

Answer №3

Utilize the aspect-ratio property within your @media queries to dynamically adjust the background-position.

body {
  background: url('http://elelur.com/data_images/mammals/tiger/tiger-06.jpg') 0 0 no-repeat;
  background-size: 100%;
}
@media (min-aspect-ratio: 3/1)  {
  body {
    background-position: center 20%;
  }
}

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