Modifying images through resizing and scaling within a flexible web application to accommodate different screen dimensions

With my web application, I have an image that changes in sizes as it calls a different image from the database each time it is viewed. My goal is to make sure this image is displayed responsively on different devices. For smartphones, I want the image to fit the screen but be slightly smaller, leaving around 30% of the screen for text and taking up 70% for the image.

The application is already developed and the image is integrated, but I want to ensure that all image sizes are displayed correctly on various browsers – both mobile and desktop ones.

How can I scale the image so that regardless of the device or the size of the image being called, it will fit the screen at around 70% on smaller devices and maintain its normal size on desktop or tablet views? If the image is too large, I also want it to be scaled down in other views.

Should I consider using ImageMagick, picturefill, CSS, JavaScript (jQuery, CoffeeScript, Bootstrap), or can I handle it with plain HTML5? Is there any advanced technique like canvas that I should incorporate?

htmlimagecssresizeresponsive-design

Answer №1

If you're looking to optimize your website for mobile devices, consider utilizing CSS3 Media Queries. These queries allow you to adjust the layout and size of elements based on the device's screen size.

For example, you can target smartphones specifically by setting specific parameters for image sizes within a media query. This way, the image will adjust its size based on the device dimensions:

@media screen 
and (min-device-width : 320px) 
and (max-device-width : 480px) {
  #myImg { 
    width:70%;
  }
}

In your main CSS file, you can keep the image at its original size for regular website viewing. It's also recommended to separate your Media Query CSS into an external stylesheet for better organization. Here's an example of how you can include these stylesheets in the <head>:

<link rel="stylesheet" type="text/css" href="desktopStyle.css">
<link rel="stylesheet" media="screen and (min-device-width: 320px) and (max-device-width: 480px)" href="smartphoneStyle.css">

Answer №2

I recently discovered the usefulness of picturefill and I must say, it's quite impressive.

For even greater control over classnames and image loading events, I recommend giving my jquery-pikshur plugin a try.

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