Shitty mass archiving Facebook messenger conversations

mass-archive-messenger-conversations.js

// 1. Open https://www.messenger.com/
// 2. Scroll to the bottom until all converstations are loaded, and run this from the console.

var converstaionsNumber = document.querySelectorAll('[aria-label="Conversation actions"]').length - 1;

function archiveLast() {
	document.querySelectorAll('[aria-label="Conversation actions"]')[converstaionsNumber--].click();
	setTimeout(function() { 
		var button = document.getElementsByClassName('_54nh')[1];
		if (button.textContent != "Archive") {
			button = document.getElementsByClassName('_54nh')[2];
		}
		button.click();
	}, 5);
	
	if (converstaionsNumber >= 0) {
		setTimeout(archiveLast, 5);
	}
}

// Note: I started from the bottom because I wanted to keep the newest/active chats, so I just existed the page when arrived to that point.
//       You can stop a second before, and do the last 1-2 manually, or with the same function (but remove the recursive call!)
// TODO:
//       * Auto scroll to the bottom
//       * Set a number of chats to leave unchanged