swiper bugs if multi swipers exit

var exist=false;
var Idarray=[‘index‘];
for (var i = 0; i < Idarray.length; i++) {
    if (Idarray[i] == showedId) {
        exist = true;
        console.log(‘exist already‘);
        return;
    }
}
//only init when it doesn‘t exist.
if (!exist) {
    Idarray.push(showedId);
    console.log(Idarray);
    new Swiper(‘#‘ + showedId + ‘-swiper‘, {
        pagination: ‘.swiper-pagination‘,
        paginationType: ‘fraction‘
    });
}