discord-reaction-hotkey.js

(function() {
  var loadScript = function(s) {
    var script = document.createElement('script');
    script.src = s;
    document.body.appendChild(script);
  };

  var simulatedClick = function(target, options) {
    var event = target.ownerDocument.createEvent('MouseEvents'),
    options = options || {},
    opts = { // These are the default values, set up for un-modified left clicks
      type: 'click',
      canBubble: true,
      cancelable: true,
      view: target.ownerDocument.defaultView,
      detail: 1,
      screenX: 0, //The coordinates within the entire page
      screenY: 0,
      clientX: 0, //The coordinates within the viewport
      clientY: 0,
      ctrlKey: false,
      altKey: false,
      shiftKey: false,
      metaKey: false, //I *think* 'meta' is 'Cmd/Apple' on Mac, and 'Windows key' on Win. Not sure, though!
      button: 0, //0 = left, 1 = middle, 2 = right
      relatedTarget: null,
    };

    //Merge the options with the defaults
    for (var key in options) {
      if (options.hasOwnProperty(key)) {
        opts[key] = options[key];
      }
    }

    //Pass in the options
    event.initMouseEvent( opts.type, opts.canBubble, opts.cancelable, opts.view, opts.detail, opts.screenX, opts.screenY, opts.clientX, opts.clientY, opts.ctrlKey, opts.altKey, opts.shiftKey, opts.metaKey, opts.button, opts.relatedTarget)

    //Fire the event
    target.dispatchEvent(event);
  };


  loadScript('https://cdnjs.cloudflare.com/ajax/libs/mousetrap/1.6.1/mousetrap.min.js');

  var wait = setInterval(function() {
    if(typeof window.Mousetrap !== "undefined") {
      clearInterval(wait);

      Mousetrap(document.querySelector("#app-mount")).bind("ctrl+shift+\\", function() {
        var el = document.querySelector('.message-group:last-child .message:last-child .message-text:last-child > .btn-reaction');
        simulatedClick(el);
      });
    }
  }, 100);
})();