<div class="content-show-img">
　　<div class="show-img">
　　　　<img class="default-image" :src="data.image" @load="successLoadImg" @error="errorLoadImg">
　　</div>
</div>

Vue.prototype.successLoadImg = function(event) {
  if (event.target.complete == true) {
    event.target.classList.remove("default-image");;
    var imgParentNode = event.target.parentNode;
    if(imgParentNode.classList.contains('show-img')==true){
      imgParentNode.style.background = "#000";
    }
  }
};
Vue.prototype.errorLoadImg = function(event) {
  event.target.classList.add("default-image");;
};