Adjusting the size of background images using media queries to scale down accordingly with the size of the browser window while

Currently, I am working on a website project where I am using a background image with Bootstrap 4. However, I am facing an issue where the image does not center properly as it resizes at different breakpoints. I am contemplating whether to use resized images from Photoshop or resize the images using CSS in order to maintain the centering of the image on the screen. Below is a snippet of the media query code that I have used:

.landpage-img {
    background: url(../img/bg-neon-01-2000x1333.jpg) no-repeat center center fixed;
}
Thanks for your help in advance!
csstwitter-bootstrapimagebackgroundbootstrap-4

Answer №1

If you want to center an image within a parent element, you can create a parent query like this:

.parent {
width: 100%;
position:relative;
}

Then add the following code for the image:

.landpage-img {
position:absolute;
left: 50%;
transform: translateX(-50%);
}

This will position your image in the middle of the parent selector.

Answer №2

You have the choice of utilizing either background-size: cover; or background-size: contain;.

For example:

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">

<style>
.landpage-img {
    background: url(https://picsum.photos/2000/1333) no-repeat center center fixed;
    background-size: cover;
}
</style>

<div class="container-fluid landpage-img" style="height: 100vh">
    <div class="row">
        <div class="col">
            Some content goes here
        </div>
    </div>
</div>

background-size: contain; retains the image proportions, while background-size: cover; ensures complete coverage even if slight cropping is required. Therefore, choosing background-size: cover; is usually recommended.

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