using elem.addEventListener('event', this);

EventListener_with_this_as_handler.js

 getElem() {
        if (!this.elem) {
            this.render();
        }
        return this.elem;
    }

    render() {
        let html = _.template('<div class="user-list"></div>')();
        this.elem = createElementFromHTML(html);

        this.elem.addEventListener('click', this);
    }

    handleEvent(event) {
        this[
            'on' +
            event.type[0].toUpperCase() +
            event.type.slice(1)
        ](event);
    }

    onClick(event) {
        if (event.target.dataset.userId) {
            this.elem.dispatchEvent(new CustomEvent('user-select', {
                bubbles: true,
                detail: event.target.dataset.userId
            }));
            event.preventDefault();
        }
    }