Expanding images using basic HTML techniques

Current Situation: In the process of developing an application that involves setting a background image, I aim to make it compatible with mobile, desktop, and tablet devices.

Query:

I am seeking advice on the most effective method to stretch and display the image without causing page lag. How can I implement fluid design?

Code Example:

This is my current approach. Any suggestions for improvement would be appreciated!

html { 
  background: url(images/bg.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}
jquerycsshtmlstretch

Answer №1

To achieve this effect on modern browsers, you can simply utilize the following CSS snippet:

#container {
    background-image: url('image.jpg');
    background-size: cover;
}

UPDATE The original poster has edited their post with additional code, so this solution may no longer be relevant.

Answer №2

The outcome varies depending on the picture:

If the image includes elements that cannot be easily stretched, like text, portraits, animal photos, or pictures of bicycles, you will have to maintain the original proportions ('aspect ratio').

There are 3 methods in CSS for scaling while preserving aspect ratio, but none of them is flawless across all device types:

'contain' creates gaps either on the sides OR at the top and bottom based on the device's size:

body {
    background: url(images/bg.jpg);
    background-repeat: no-repeat;
    background-position: center; 
    background-size: contain; 
}

'cover' fills the background entirely but may zoom into the image depending on device size, cutting off parts from the top and bottom:

body {
    background: url(images/bg.jpg);
    background-repeat: no-repeat;
    background-position: center; 
    background-size: cover; 
}

NOTE Background-size feature requires CSS3 and may not function with older versions of Internet Explorer.

CSS2 - The third method works universally across browsers and behaves similarly to 'background-size: contain;' causing a gap when the image does not fit within the viewport:

.img_width {
    width: 100%; 
    height: auto; 
}

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