Get all JavaScript events.js

const getEventNames = (root) => {
  let events = [ ];
  
  const objectHasSubPrototype = (object, comp) => {
    let proto = Object.getPrototypeOf(object);

    while(proto !== null && proto !== EventTarget) {
      proto = Object.getPrototypeOf(proto);
    }
    
    return (proto !== null);
  };
  
  const addEventNames = (propNames) => {
    propNames.filter(x => x.match(/^on\w+$/)).forEach((propName) => {
      propName = propName.substr(2);
      if(events.indexOf(propName) === -1) {
        events.push(propName);
      }
    });
  };

  Object.getOwnPropertyNames(root).forEach((name) => {
    let value = root[name];
    
    if(value) {
      if(objectHasSubPrototype(value, EventTarget)) {
        let propNames = Object.getOwnPropertyNames(Object.getPrototypeOf(value).prototype);
        addEventNames(propNames);
        
        propNames = Object.getOwnPropertyNames(window);
        addEventNames(propNames);
      }
    }
  });
  
  return events;
};

getEventNames(window).forEach((eventName) => {
  window.addEventListener(eventName, (event) => console.log(eventName, event));
});