tinder-force-like.user.js

// ==UserScript==
// @name         Tinder Force Like
// @namespace    http://senta.me/
// @version      0.1.0
// @description  Like all girls/guys on tinder.com
// @author       @__senta
// @match        https://tinder.com/*
// @grant        none
// ==/UserScript==

(function() {
  'use strict';

  let heart
  let modal

  /**
   * watch the DOM while it's ready to start
   */
  requestAnimationFrame(function beReady () {
    heart = document.querySelector('[aria-label=Like]')
    modal = document.querySelector('#modal-manager')

    if (heart && modal) {
      onReady()
    } else {
      requestAnimationFrame(beReady)
    }
  })

  /**
   * Start like
   */
  function onReady () {
    requestAnimationFrame(function tick () {
      heart.click()
      modal.firstChild || requestAnimationFrame(tick)
    })
  }

})();