Leveraging parameters or pre-established variables within CSS

After successfully adding CSS to customize a checkbox, I utilized a local file (check.png) as the background image and cropped it within the checkbox boundaries.

Below are two examples of checkboxes: one checked and one unchecked

I am now curious if there is a way to automatically determine the dimensions of the background image instead of manually setting them as 25px in the CSS file. Ideally, I would like to set the width to background.width and the height to background.height/2. This way, any updates made to the check.png file would result in automatic resizing without compromising functionality.

EDIT: To clarify, my goal is for the box surrounding the checkbox to adjust to fit the background image, rather than forcing the image to fit within the box. Nonetheless, I will explore both options.

EDIT2: Disregard my previous edit. It turns out that fitting the background image within the box was a more effective approach than attempting to fit the box within the image. Lesson learned! Thanks :D

javascripthtmlcsscheckbox

Answer №1

There is no need to specify the precise width and height. For resizing the background image to fit within its container, you can just apply:

background-size:contain;

Answer №2

adjust 

background-size: 100% 100%;
background-repeat: no-repeat;

Answer №3

Here is a simple javascript code snippet to retrieve image width and height:

const image = new Image();
image.onload = function() {
  console.log('Image dimensions: ' + this.width + 'x' + this.height);
}
image.src = 'https://example.com/image.png';

Answer №4

@Durga has provided a suitable answer that meets your requirements.

It may not be advisable to rely on the resource file to determine the size of your DOM component. It is usually better practice to use CSS to automatically adjust the image to fit within your container, as suggested by @Koby.

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