vue實現預覽功能（包括doc，pdf，圖片，視頻）

<template>
<el-button @click="previewPdf(scope.row)" type="text" size="small" v-if="">
    <div class="images" v-viewer="{ navbar: false}">
        <img v-for="(src, index) in images" style="width: 100%" :src="src" :key="src" hidden> 預覽 </div>
</el-button>

<el-dialog :visible="showDoc == true || showPdf == true || showVideo == true" :show-close="true" :width="'80%'" class="dialog-div-pre-style" :before-close="closePreviewClick" center>
    <div v-if="showDoc == true" class="dialog-body-content-base-style">
        <iframe frameborder="0" :src="'https://view.officeapps.live.com/op/view.aspx?src=' + this.fileUrl" width='100%'>
        </iframe>
    </div>
    <div v-else-if="showPdf == true" class="dialog-body-content-base-style" style="justify-content: center; align-items: center">
        <embed :src="pdfUrl" style="width: 100%; height: 100%"/>
    </div>
    <div v-else-if="showVideo == true" class="dialog-body-content-base-style" style="justify-content: center; align-items: center">
        <video-player class="video-player vjs-custom-skin" ref="positiveVideoPlayer" :playsinline="true" :options="positivePlayerOptions"
        ></video-player>
    </div>
</el-dialog>
</template>
<script> export default{ 　　data(){ 　　　　return { showDoc: false, showPdf: false, showVideo: false, fileUrl: "", images: [], currentPage: 0, // pdf文件頁碼
pageCount: 0, // pdf文件總頁數
pdfUrl: "", scale: 1.0, /** *播放器配置 */ positivePlayerOptions: { playbackRates: [0.5, 1.0, 1.5, 2.0], //播放速度
 autoplay: false, //若是true,瀏覽器準備好時開始回放。
 muted: false, // 默認狀況下將會消除任何音頻。
 loop: false, // 致使視頻一結束就從新開始。
 preload: 'auto', // 建議瀏覽器在<video>加載元素後是否應該開始下載視頻數據。auto瀏覽器選擇最佳行爲,當即開始加載視頻（若是瀏覽器支持）
 language: 'zh-CN', aspectRatio: '16:9', // 將播放器置於流暢模式，並在計算播放器的動態大小時使用該值。值應該表明一個比例 - 用冒號分隔的兩個數字（例如"16:9"或"4:3"）
 fluid: true, // 當true時，Video.js player將擁有流體大小。換句話說，它將按比例縮放以適應其容器。
 sources: [{ type: "", src: "" //視頻url地址
 }], poster: "", //你的封面地址
    // width: document.documentElement.clientWidth,
 notSupportedMessage: '此視頻暫沒法播放，請稍後再試', //容許覆蓋Video.js沒法播放媒體源時顯示的默認信息。
 controlBar: { timeDivider: true, durationDisplay: true, remainingTimeDisplay: false, fullscreenToggle: true  //全屏按鈕
 }, common: "positivePlayer", }, 　　　　} 　　} },
methods:{
　/**

 * pdf預覽
 */
previewPdf(row) {
 let type = this.iconByType(row);
 this.fileUrl = row.url
 if (type.indexOf("doc") != -1 || type.indexOf("docx") != -1 || type.indexOf("xsl") != -1 || type.indexOf("xslx") != -1) {
 this.showDoc = true
 } else if (type.indexOf("pdf") != -1) {
 this.pdfUrl = "http://47.105.218.26:8888/group1/M00/00/00/rB-LJlzT042AbKdCAAiu_35Yccs182.pdf"
 this.showPdf = true
 } else if (type.indexOf("jpg") != -1 || type.indexOf("png") != -1 || type.indexOf("jpeg") != -1) {
 this.images = this.getUrlListByName(row.url)
 const viewer = this.$el.querySelector('.images').$viewer
 viewer.show()
 } else if (type.indexOf("avi") != -1 || type.indexOf("mp4") != -1 || type.indexOf("webm") != -1 || type.indexOf("m4v") != -1 || type.indexOf("rmvb") != -1 || type.indexOf("mpg") != -1 || type.indexOf("3gp") != -1 || type.indexOf("swf") != -1 || type.indexOf("mkv") != -1) {
 this.positivePlayerOptions.sources[0].src = "//nos.netease.com/vod163/demo.mp4"
 this.positivePlayerOptions.sources[0].type = "video/mp4"
 this.showVideo = true
 } else {
 this.$message("當前文件暫不支持預覽")
 }
 // this.showPdf = true
},
/**
 * 經過文件後綴返回文件的圖標
 */
iconByType(row) {
 return row.fileName.substring(row.fileName.lastIndexOf(".") + 1, row.fileName.length)
},
closePreviewClick() {
 if (this.showDoc == true) {
 this.showDoc = false
 } else if (this.showPdf == true) {
 this.showPdf = false
 } else if (this.showVideo == true) {
 this.showVideo = false
 }
},

}

</script>