Automatically download reddit post and all it's comments

script.js

/* Instructions
1. Click on a reddit post you're interested in.
2. Open the dev tools ('F12') go to the `Console` tab.
3. Copy & paste in the code bellow and press 'Enter'.
	- Wait for the page to fully load
	- Make sure any comments aren't folded (they shouldn't be if the page just loaded)
	- Scroll to the bottom of the page to make sure all comments are loaded.
	- If you've run this script once, you'll need to reload the page.

4. Enjoy!
*/

// Function that discretely creates a text file and automatically downloads it -> https://ourcodeworld.com/articles/read/189/how-to-create-a-file-and-generate-a-download-with-javascript-in-the-browser-without-a-server
const downloadFile = (filename, text) => {
  const el = document.createElement('a');
  el.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));
  el.setAttribute('download', filename);

  el.style.display = 'none';
  document.body.appendChild(el);

  el.click();

  document.body.removeChild(el);
};

// 30.09.2023
const [postParent] = document.querySelectorAll('div[data-test-id=post-content]');
const postTitle = postParent.querySelector('div[data-adclicklocation=title]').innerText;
const posterUsername = postParent.querySelector('a[data-testid=post_author_link]').textContent;
const postText = postParent.querySelector('p').parentElement.textContent;

const commentTextEls = [...document.querySelectorAll('div[data-testid=comment]')];

let counter = 1;
let final = '';
const padString = '	';

// ---

final += posterUsername + ' - ' + postTitle + '\n\n';
final += postText + '\n\n';

final += '==================';

commentTextEls.map(commTextEl => {
	// 30.09.2023
	const commParent = commTextEl.parentElement;
	const commUsername = commParent.querySelector('a[data-testid=comment_author_link]').textContent;
	const level = parseFloat(commParent.querySelector('span').textContent.split(' ').pop()) - 1;
	const commText = commTextEl.textContent;
	
	final += '\n\n';
	final += padString.repeat(level) + `${counter++}. u/${commUsername}\n`;
	final += padString.repeat(level) + commText
});

downloadFile(`${postTitle}.txt`, final);