DOM: HTML DOM for XML

XML also defines an XML DOM like HTML DOM, which provides mostly the same API.

All modern browsers have a built-in XML parser that converts XML text into an in-memory DOM tree.
There are two main ways to parse.
1. DOMParser: Parses an XML string directly.
js
```
  const parser = new DOMParser();
  const doc = parser.parseFromString(xmlString, "text/xml");
```
1. XMLHttpRequest: Fetches XML from a URL and parses it. .responseXML gives you the DOM tree directly.

Once parsed, the XML becomes a tree of node objects (elements, attributes, text). You navigate it with standard DOM methods (.getElementsByTagName(), .querySelector(), etc.).

If the XML is malformed, DOMParser doesn't throw. Instead it returns a document containing a <parsererror> element.