<img  :src="item.content"
      @load="handleImageLoad(item)"    @error="setDefaultImg" />

import defaultImg from "../imgs/error.png";
methods: {
    
    
    handleImageLoad(itemData) {
    
    
      itemData.showImg = false
    },
    setDefaultImg(e){
    
    
      // debugger
      e.target.src = defaultImg;
    },