function addEventListeners() {
    window.addEventListener('resize', this.eventListener);
    this.scrollParents.forEach(parent => {
        parent.addEventListener('scroll', this.eventListener);
    });
}
function addEventListeners() {
    window.addEventListener('resize', this.eventListener);
    this.scrollParents.forEach(parent => {
        parent.addEventListener('scroll', this.eventListener);
    });
}
function addEventListeners ( ) { window . addEventListener ( 'resize' , this . eventListener ) ; this . scrollParents . forEach ( parent => { parent . addEventListener ( 'scroll' , this . eventListener ) ; } ) ; }
must be called in context of a hone
must be called in context of a hone