matchMedia()

export default class Gallery {
    constructor(type, gallery) {
        this.mediaquery = window.matchMedia('(max-width: 768px)');
        this.mediaquery.addListener(() => {
            this.doSomething(this.mediaquery);
        });
        this.doSomething(this.mediaquery);
    }

    doSomething(mediaquery) {
        if (mediaquery.matches) {
            // do something
        }
    }
}