SOURCE

function bind(fn, context) {
    var args = Array.prototype.slice.call(arguments, 2);
    return function() {
        var innerArgs = Array.prototype.slice.call(arguments);
        var finalArgs = args.concat(innerArgs);
        return fn.call(context, ...finalArgs);
    }
}

var handler = {
    message: "Event handled",

    handleClick: function(name, event) {
        console.log(this.message + ":" + name + ":" + event.type);
    }
};

var btn = document.getElementById("my-btn");
btn.addEventListener("click", bind(handler.handleClick,handler,"my-btn"));

<button id="my-btn">click</button>