element UI自带的图片预览插件，实现点击按钮预览图片列表

<template>
    <div>
        <el-button @click="showViewer=true">预览</el-button>
        <el-image-viewer
             v-if="showViewer"
             :on-close="()=>{showViewer=false}"
             :url-list="imgList" />
    </div>
    </template>
    <script>
    export default {
    name: 'Index',
    components: {
            'el-image-viewer':()=>import('element-ui/packages/image/src/image-viewer')
        },
    data() {
        return {
         showViewer: false,
         imgList:['1.jpg','2.jpg']
        }
    }
</script>