How to get image size (height & width) using JavaScript?

Question

Are there any JavaScript or jQuery APIs or methods to get the dimensions of an image on the page?

Answer 1

Also (in addition to Rex and Ian's answers) there is:

imageElement.naturalHeight

and

imageElement.naturalWidth

These provide the height and width of the image file itself (rather than just the image element).

Answer 2

You can programmatically get the image and check the dimensions using Javascript...

const img = new Image();
img.onload = function() {
  alert(this.width + 'x' + this.height);
}
img.src = 'http://www.google.com/intl/en_ALL/images/logo.gif';

This can be useful if the image is not a part of the markup.

Answer 3

clientWidth and clientHeight are DOM properties that show the current in-browser size of the inner dimensions of a DOM element (excluding margin and border). So in the case of an IMG element, this will get the actual dimensions of the visible image.

var img = document.getElementById('imageid'); 
//or however you get a handle to the IMG
var width = img.clientWidth;
var height = img.clientHeight;

Answer 4

var imgSrc, imgW, imgH;
function myFunction(image){
    var img = new Image();
    img.src = image;
    img.onload = function() {   
        return {
            src:image,
            width:this.width,
            height:this.height};
        }
    return img;
}
var x = myFunction('http://www.google.com/intl/en_ALL/images/logo.gif');
    //Waiting for the image loaded. Otherwise, system returned 0 as both width and height.
x.addEventListener('load',function(){
    imgSrc = x.src;
    imgW = x.width;
    imgH = x.height;
});
x.addEventListener('load',function(){
    console.log(imgW+'x'+imgH);//276x110
});
console.log(imgW);//undefined.
console.log(imgH);//undefined.
console.log(imgSrc);//undefined.

This is my method, hope this helpful. :)

Answer 5

Thought this might be helpful to some who are using Javascript and/or Typescript in 2019.

I found the following, as some have suggested, to be incorrect:

let img = new Image();
img.onload = function() {
  console.log(this.width, this.height) // Error: undefined is not an object
};
img.src = "http://example.com/myimage.jpg";

This is correct:

let img = new Image();
img.onload = function() {
  console.log(img.width, img.height)
};
img.src = "http://example.com/myimage.jpg";

Conclusion:

Use img, not this, in onload function.

Answer 6

Using JQuery you do this:

var imgWidth = $("#imgIDWhatever").width();