Javascript 阻止 css？

Question

我正在构建一个灯箱相册。当第一个图像加载时，CSS 转换起作用。当加载后的每个图像都没有。任何想法为什么？加载第一张之后的照片，但没有过渡。

Image.prototype.load = function(url){
          var thisImg = this;
          var xmlHTTP = new XMLHttpRequest();
          xmlHTTP.open('GET', url,true);
          xmlHTTP.responseType = 'arraybuffer';
          xmlHTTP.onload = function(e) {
              var blob = new Blob([this.response]);
              thisImg.src = window.URL.createObjectURL(blob);
          };
          xmlHTTP.onprogress = function(e) {
              thisImg.completedPercentage = parseInt((e.loaded / e.total) * 100);
          };
          xmlHTTP.onloadstart = function() {
              thisImg.completedPercentage = 0;
          };
          xmlHTTP.onloadend = function() {
              thisImg.completedPercentage = 0;
              gallery.appendChild(currentImage);
              gallery.className = "gallery toggle";
          };
          xmlHTTP.send();
        };

.gallery {
  display: absolute;
  position: fixed;
  margin: auto;
  visibility: hidden;
  opacity: 0;
  -moz-transition: opacity 0.5s, visibility 0.5s ease-in-out;
  -webkit-transition: opacity 0.5s, visibility 0.5s ease-in-out;
  -ms-transition: opacity 0.5s, visibility 0.5s ease-in-out;
  transition: opacity 0.5s, visibility 0.5s ease-in-out;
  background: rgba(0, 0, 0, 0.0);
  width: 96%;
  height: 96%;
  margin-top: 2%;
  margin-left: 2%;
  overflow: hidden;
  z-index: 1001;
}

.gallery.toggle {
  visibility: visible;
  opacity: 1;
}

Answer 1

您的 CSS 在页面加载时执行。当您动态添加或删除内容时，CSS 不会再次加载。加载图像后，您可能必须使用 JS 创建转换。

也许这有帮助:

https://timtaubert.de/blog/2012/09/css-transitions-for-dynamically-created-dom-elements/