Trying to use the DOMParser with node js

Javascript Problem Overview

I am running into issues when trying to use the DOMParser in my js code. In my code, I retrieve an xml file via xmlhttp.responseText soap response. I want to be able to access its elements in JSON format, so my code looks like:

var xml = new DOMParser();
xml = xml.parseFromString(xmlhttp.responseText, 'text/xml');
var result = xmlToJson(xml);

I get this error message: ReferenceError: DOMParser is not defined

Edit: This link hasn't worked for me because my javascript isn't in the HTML page, as it is a node.js file. <https://stackoverflow.com/questions/9250545/javascript-domparser-access-innerhtml-and-other-properties>

Javascript Solutions

Solution 1 - Javascript

A lot of browser functionalities, like DOM manipulations or XHR, are not available natively NodeJS because that is not a typical server task to access the DOM - you'll have to use an external library to do that.

DOM capacities depends a lot on the library, here's a quick comparisons of the main tools you can use:

jsdom: implements DOM level 4 which is the latest DOM standard, so everything that you can do on a modern browser, you can do it in jsdom. It is the de-facto industry standard for doing browser stuff on Node, used by Mocha, Vue Test Utils, Webpack Prerender SPA Plugin, and many other:
```
const jsdom = require("jsdom");
const dom = new jsdom.JSDOM(`<!DOCTYPE html><p>Hello world</p>`);
dom.window.document.querySelector("p").textContent; // 'Hello world'
```

deno_dom: if using Deno instead of Node is an option, this library provides DOM parsing capabilities:

import { DOMParser } from "https://deno.land/x/deno_dom/deno-dom-wasm.ts";
const parser = new DOMParser();
const document = parser.parseFromString('<p>Hello world</p>', 'text/html');
document.querySelector('p').textContent; // 'Hello world';

htmlparser2: same as jsdom, but with enhanced performances and flexibility at the price of a more complex API:

const htmlparser = require("htmlparser2");
const parser = new htmlparser.Parser({
  onopentag: (name, attrib) => {
    if (name=='p') console.log('a paragraph element is opening');
  }
}, {decodeEntities: true});
parser.write(`<!DOCTYPE html><p>Hello world</p>`);
parser.end();
// console output: 'a paragraph element is opening'

cheerio: implementation of jQuery based on HTML DOM parsing by htmlparser2:

const cheerio = require('cheerio');
const $ = cheerio.load(`<!DOCTYPE html><p>Hello world</p>`);
$('p').text('Bye moon');
$.html(); // '<!DOCTYPE html><p>Bye moon</p>'

xmldom: fully implements the DOM level 2 and partially implements the DOM level 3. Works with HTML, and with XML also
dom-parser: regex-based DOM parser that implements a few DOM methods like getElementById. Since parsing HTML with regular expressions is a very bad idea I wouldn't recommend this one for production.

Solution 2 - Javascript

There is no DOMParser in node.js, that's a browser thing. You can try any of these modules though:

https://github.com/joyent/node/wiki/modules#wiki-parsers-xml

Solution 3 - Javascript

You can use a Node implementation of DOMParser, such as xmldom. This will allow you to access DOMParser outside of the browser. For example:

var DOMParser = require('xmldom').DOMParser;
var parser = new DOMParser();
var document = parser.parseFromString('Your XML String', 'text/xml');

Solution 4 - Javascript

I used jsdom because it's got a ton of usage and is written by a prominent web hero - no promises that it's behavior perfectly matches your browser (or even that every browser's behavior is the same) but it worked for me:

const jsdom = require("jsdom")
const { JSDOM } = jsdom
global.DOMParser = new JSDOM().window.DOMParser

Solution 5 - Javascript

I really like htmlparser2. It's a fantastic, fast and lightweight library. I've created a small demo on how to use it on RunKit: https://runkit.com/jfahrenkrug/htmlparser2-demo/1.0.0

Solution 6 - Javascript

var DOMParser = require('xmldom').DOMParser;
var doc = new DOMParser().parseFromString(
    '<xml xmlns="a" xmlns:c="./lite">\n'+
        '\t<child>test</child>\n'+
        '\t<child></child>\n'+
        '\t<child/>\n'+
    '</xml>'
    ,'text/xml');

Solution 7 - Javascript

I use yet another DOM parser from html string to DOM and back > Himalaya, or at npmjs.com:

import { parse, stringify } from 'himalaya';

const dom = parse(htmlString)

// Do something here

const htmlStringNext = stringify(dom)

Solution 8 - Javascript

RSS parser is easy for parsing Atom feeds. I you are using NextJs for example you can simply create an API like so:

import Parser from 'rss-parser'

export default async function API(req, res) {
    let parser = new Parser();
    try {
        const feed = await parser.parseURL(`https://www.nasa.gov/rss/dyn/lg_image_of_the_day.rss`);
        if (feed) return res.json({ "message": `Here is your data feed title`, status: 200, data: feed.title })
    } catch (error) {
        return res.json({ "message": "You made an invalid request", status: 401 })
    }
}

Content Type	Original Author	Original Content on Stackoverflow
Question	Stephen D	View Question on Stackoverflow
Solution 1 - Javascript	Nino Filiu	View Answer on Stackoverflow
Solution 2 - Javascript	Esailija	View Answer on Stackoverflow
Solution 3 - Javascript	Chris Alley	View Answer on Stackoverflow
Solution 4 - Javascript	Jon z	View Answer on Stackoverflow
Solution 5 - Javascript	Johannes Fahrenkrug	View Answer on Stackoverflow
Solution 6 - Javascript	Anjali	View Answer on Stackoverflow
Solution 7 - Javascript	Roman	View Answer on Stackoverflow
Solution 8 - Javascript	w. Patrick Gale	View Answer on Stackoverflow