Gets a list of all events in the browser

get-events.js

const isEvent0 = prop => 0 === prop.indexOf('on');

const getEventNames0 = (obj) => {
    const result = [];
    for (let prop in obj) {
        if (!isEvent0(prop)) continue;
        prop = prop.substr(2), result.push(prop);
    }
    return result;
}

const getEvents = () => {
    const result = {};
    const arr = Object.getOwnPropertyNames(window);
    result['window'] = getEventNames0(window, hasOwnProperty);
    
    for (let i = 0; i < arr.length; i++) {
        const element = arr[i];
  
        const obj = window[element];
        if (!obj || !obj['prototype']) continue;

        const proto = obj['prototype'];
        if(!proto) continue; 

        const resultArray = getEventNames0(proto);
        if(!resultArray.length) continue; 

        result[element] = resultArray;
    }
    return result;
}

console.info(getEvents());