Yes, and I’d do it like this…
window.onload = function () {
var imageSrc = document
.getElementById('hello')
.style.backgroundImage.replace(/url\((['"])?(.*?)\1\)/gi, '$2')
.split(',')[0];
// I just broke it up on newlines for readability
var image = new Image();
image.src = imageSrc;
image.onload = function () {
var width = image.width,
height = image.height;
alert('width=" + width + ", height=" + height);
};
};
Some notes…
- We need to remove the
url()
part that JavaScript returns to get the proper image source. We need to split on,
in case the element has multiple background images. - We make a new
Image
object and set itssrc
to the new image. - We can then read the width & height.
jQuery would probably a lot less of a headache to get going.