@exadel/esl/modules/esl-image-utils/core/esl-image-utils.fade.less

Exadel Smart Library (ESL) is the lightweight custom elements library that provide a set of super-flexible components

.img-fade {
  opacity: 0;

  &.img-container-loaded,
  .img-container-loaded & {
    opacity: 1;
    transition: opacity 0.4s;
  }
}