<script src="//unpkg.com/vue/dist/vue.js"></script><script src="//unpkg.com/element-ui@2.0.2/lib/index.js"></script><div id="app"><el-upload action="https://jsonplaceholder.typicode.com/posts/" list-type="picture-card" :on-preview="handlePictureCardPreview" :on-remove="handleRemove"> <i class="el-icon-plus"></i></el-upload><el-dialog v-model="dialogVisible" size="tiny"> <img width="100%" :src="dialogImageUrl" alt></el-dialog></div>@import url("//unpkg.com/element-ui@2.0.2/lib/theme-chalk/index.css");var Main = { data() { return { dialogImageUrl: '', dialogVisible: false }; }, methods: { handleRemove(file, fileList) { console.log(file, fileList); }, handlePictureCardPreview(file) { this.dialogImageUrl = file.url; } } }var Ctor = Vue.extend(Main)new Ctor().$mount('#app')