vue移动端图片预览，使用photoSwipe插件

photoswipe.js

var doc=document,
    domEl=doc.createElement("div");
    domEl.innerHTML='
';
    domEl.className="pswp";
    domEl.tabIndex="-1";
    domEl.setAttribute("role","dialog");
    domEl.setAttribute("aria-hidden","true");
    doc.body.appendChild(domEl);
    domEl.offsetHeight;

exports.open=function(items,index){
    var gallery = new PhotoSwipe(domEl, PhotoSwipeUI_Default, items,{index:index});
    gallery.init();
    return gallery;
};