How to parse xml effectively in javascript

Question

I have a big xml structure. I am interested in certain xml structure like below. I need to extract img tags only and the value of the src attribute if they are inside coral-card

Answer 1

DOMParser and xpath are very easy to use for parsing xml. You can do something like:

const DOMParser = require('xmldom').DOMParser;
const xpath = require('xpath');

let parser = new DOMParser();
let doc = parser.parseFromString(<your xml>);
let document = doc.documentElement;
let coralCards = xpath.select('<path>/coral-card', document);

See xpath docs for all of the ways you can extract nodes out of an xml blob.

Answer 2

This is exactly why the core DOM specification was created:

// Find all the <coral-card> elements:
var elements = document.getElementsByTagName("coral-card");

// Loop through them:
for(var i = 0; i < elements.length; ++i){
  // Extract whatever you need:
  console.log(elements[i].getAttribute("variant"));
  console.log(elements[i].querySelector("img").src);
}

<coral-card variant="condensed" data-timeline="true" stacked>
    <coral-card-asset>
        <img src="/content/dam/collections/3/3qtVFsGwnDVKpZ6H_SaM/lightbox.folderthumbnail.jpg?width=240&height=240">
    </coral-card-asset>
 </coral-card>

<coral-card variant="semi-condensed" data-timeline="true" stacked>
    <coral-card-asset>
        <img src="/content/dam/collections/3/3qtVFsGwnDVKpZ6H_SaM/small.folderthumbnail.jpg?width=240&height=240">
    </coral-card-asset>
 </coral-card>