Counts words and characters in all textareas to show them on hover.

Word Counter.user.js

// ==UserScript==
// @name         Word Counter
// @namespace    https://github.com/Kadauchi
// @version      1.0.2
// @description  Counts words and characters in all textareas to show them on hover.
// @author       Kadauchi
// @icon         http://i.imgur.com/oGRQwPN.png
// @include      *
// ==/UserScript==

setInterval(main, 250);

function getAllTextareas() {
  return document.querySelectorAll(`textarea`);
}

function getWordCount(text) {
  const possibleWords = text.split(/\s+/);
  const hasCharacters = possibleWords.filter((word) => word.length);
  return hasCharacters.length;
}

function setCountAsTitle(textarea) {
  const text = textarea.value;
  const wordCount = getWordCount(text);
  textarea.title = `${wordCount} words ${text.length} characters`
}

function main() {
  const textareas = getAllTextareas();
  textareas.forEach(setCountAsTitle);
}