html Img标签找不到图片，给个默认图

 <img class="img" :src="1.png" alt="" @error="handleImageError" />

// 找不到图片的话会进入error方法中
const handleImageError = (e: Event) => {
  const target = e.target as HTMLImageElement;
  if (target) {
    target.src = 'default.png';
  }
};