How get the original size images (height and width) from your href and put them on your attr. using jquery

hello friends i am trying to get the size (height and width) of an image from an hrf and put these values ​​in its attribute

This is driving me crazy

this is my html:

<figure>
    <a href="image-large-1.jpg">
        <img src="image-small-1.jpg"/>
    </a>
</figure>

<figure>
    <a href="image-large-2.jpg">
        <img src="image-small-2.jpg"/>
    </a>
</figure>

<figure>
    <a href="image-large-3.jpg">
        <img src="image-small-3.jpg"/>
    </a>
</figure>

this is what I want :

<figure>
    <a href="image-large-1.jpg" original-size="1000x800">   //the sizes  are example
        <img src="image-small-1.jpg"/>
    </a>
</figure>

<figure>
    <a href="image-large-2.jpg" original-size="1200x700">   //the sizes  are example
        <img src="image-small-2.jpg"/>
    </a>
</figure>

<figure>
    <a href="image-large-3.jpg" original-size="900x980">  //the sizes  are example
        <img src="image-small-3.jpg"/>
    </a>
</figure>

the "original-size" attribute I want to get it from " a hrf "

I was trying with this code that I found here, I get the original size of the image-large from the href (in the console.log) but I cannot print them in the html

help me please

         $(".containerGallery figure a").each(function() {
                var imgSrc, imgW, imgH;
                function myFunction(image){
                    var img = new Image();
                    img.src = image;
                    img.onload = function() {   
                        return {
                            src:image,
                            width:this.width,
                            height:this.height};
                        }
                    return img;
                }
                var x = myFunction($(this).attr('href'));
                x.addEventListener('load',function(){
                    imgSrc = x.src;
                    imgW = x.width;
                    imgH = x.height;
                });
                $(this).each(function() {
                    x.addEventListener('load',function(){
                        console.log(imgW+'x'+imgH);
                        $(this).attr('original-size', imgW+'x'+imgH);
                    });
                }); 
            });

The JavaScript code in the question is overly complex and redundant.

Here's some simplified code that accomplishes the same thing.

// get all <a> elements inside <figure> elements
const atags = Array.from(document.querySelectorAll('figure a'));

// iterate over every <a> tag
atags.forEach(atag => {

  // create blank image element
  var img = new Image();

  // when the image loads, store its dimensions to the atag's
  // `data-original-size` attribute
  img.addEventListener('load', () => {
    let imgW = img.width,
      imgH = img.height;
    atag.dataset.originalSize = `${imgW}x${imgH}`;
    console.log('atag:', atag);
  });
  
  // load image from atag's href
  img.src = atag.href;

});

<figure>
  <a href="https://i.picsum.photos/id/1077/200/300.jpg">
    <img src="https://via.placeholder.com/40" />
  </a>
</figure>

<figure>
  <a href="https://i.picsum.photos/id/913/200/200.jpg">
    <img src="https://via.placeholder.com/50" />
  </a>
</figure>

<figure>
  <a href="https://i.picsum.photos/id/1058/100/100.jpg">
    <img src="https://via.placeholder.com/60" />
  </a>
</figure>