vue实现桌面向网页拖动文件(可显示图片/音频/视频)

不显示图片/播放视频音频代码如下

<template>
    <div>
        <div  v-on:dragover="tts" v-on:drop="ttrs" style="width: 800px;height: 200px;border: 1px solid black;font-size: 40px;line-height: 200px">
            {{dt}}
        </div>
        <div v-for="(item,index) in fileList" :key="index" style="width: 800px;height: 200px;border: 1px solid black;font-size: 40px;position: relative;top:10px">
            <p style="font-size: 20px;float: left;position: relative;left: 20pxword-wrap:break-word;word-break:normal;">{{item.name}}</p>
            <h5 style="float:right;position: absolute;top: 80px;right: 20px">{{item.type}}</h5>
            <h6 style="position: absolute;top: 80px;float: left;left: 20px">{{item.size | sizeType}}</h6>
            <button style="float: right" @click="del(index)">删除</button>
        </div>
    </div>
</template>

<script>
    export default {
        name: "trs",
        data(){
            return{
                dt:"",
                fileList:[]
            }
        },
        filters:{
          sizeType(val){
              let kbs = val/1024;
              let mbs = 0;
              let gbs = 0;
              if(kbs>=1024){
                  mbs = kbs/1024;
              }
              if(mbs>=1024){
                  gbs=mbs/1024
                  return gbs.toFixed(2)+"GB";
              }else if (mbs>=1){
                  return mbs.toFixed(2)+"MB"
              }else {
                  return kbs.toFixed(2)+"KB"
              }
          }
        },
        mounted() {
            let vm = this;
            window.addEventListener("dragdrop", this.testfunc, false);


           document.addEventListener("dragover",function () {
                console.log(111)
                vm.dt = "拖动到此处上传文件"
                console.log(vm.dt)
            })
        },
        methods:{
            testfunc(event) {
                alert("dragdrop!");
                event.stopPropagation();
                event.preventDefault();
            },
            del(index){
                this.fileList.splice(index,1)
                if(this.fileList.length==0){
                    this.dt = ""
                }
            },
            tts(e){
                console.log(e)
                this.dt = "拖动到此处上传文件"
            },
            ttrs(e){
                console.log(e)
                console.log(e.dataTransfer.files)
                let datas = e.dataTransfer.files;
                datas.forEach(item=>{
                    this.fileList.push(item)
                })
                e.stopPropagation();
                e.preventDefault();
                this.dt = "上传完成，可继续上传"

            }
        }
    }
</script>

<style scoped>

</style>

如果想要显示图片/播放视频/播放音频

这里我默认显示/播放最后一个上传文件 根据需求修改即可

<template>
  <div>
    <div
      v-on:dragover="tts"
      v-on:drop="ttrs"
      style="width: 800px;height: 200px;border: 1px solid black;font-size: 40px;line-height: 200px"
    >
      {{ dt }}
    </div>
    <div
      v-for="(item, index) in fileList"
      :key="index"
      style="width: 800px;height: 200px;border: 1px solid black;font-size: 40px;position: relative;top:10px"
    >
      <p
        style="font-size: 20px;float: left;position: relative;left: 20pxword-wrap:break-word;word-break:normal;"
      >
        {{ item.name }}
      </p>
      <h5 style="float:right;position: absolute;top: 80px;right: 20px">
        {{ item.type }}
      </h5>
      <h6 style="position: absolute;top: 80px;float: left;left: 20px">
        {{ item.size | sizeType }}
      </h6>
      <button style="float: right" @click="del(index)">删除</button>
    </div>
    <div style="position:relative;top: 100px">
      <img v-if="isImage" :src="srcs" style="width: 800px" />
        <video v-if="isVideo" controls :src="srcs" style="width: 800px"></video>
        <audio v-if="isAudio" controls :src="srcs" style="width: 800px"></audio>
    </div>
  </div>
</template>

<script>
export default {
  name: "trs",
  data() {
    return {
      dt: "",
      fileList: [],
      srcs:"",
        isImage:false,
        isAudio:false,
        isVideo:false
    };
  },
  filters: {
    sizeType(val) {
      let kbs = val / 1024;
      let mbs = 0;
      let gbs = 0;
      if (kbs >= 1024) {
        mbs = kbs / 1024;
      }
      if (mbs >= 1024) {
        gbs = mbs / 1024;
        return gbs.toFixed(2) + "GB";
      } else if (mbs >= 1) {
        return mbs.toFixed(2) + "MB";
      } else {
        return kbs.toFixed(2) + "KB";
      }
    }
  },
  mounted() {
    let vm = this;
    window.addEventListener("dragdrop", this.testfunc, false);

    document.addEventListener("dragover", function() {
      console.log(111);
      vm.dt = "拖动到此处上传文件";
      console.log(vm.dt);
    });
  },
  methods: {
      readFile(file){
          let vm = this;
          let reader = new FileReader();
          reader.readAsDataURL(file)
          reader.onload = function () {
              let type = file.type.substr(0,5);
              if(type=="image"){
                  vm.isImage = true;
                  vm.isAudio =false;
                  vm.isVideo = false;
              }else if(type=="audio"){
                  vm.isImage = false;
                  vm.isAudio =true;
                  vm.isVideo = false;
              }else if(type=="video"){
                  vm.isImage = false;
                  vm.isAudio = false;
                  vm.isVideo = true;
              }else {
                  alert("不是图片/视频/音频")
              }
              vm.srcs = reader.result;
              // this.$nextTick(()=>{
              //
              // })
          }
      },
    testfunc(event) {
      alert("dragdrop!");
      event.stopPropagation();
      event.preventDefault();
    },
    del(index) {
      this.fileList.splice(index, 1);
      if (this.fileList.length === 0) {
        this.dt = "";
      }
    },
    tts(e) {
      console.log(e);
      this.dt = "拖动到此处上传文件";
    },
    ttrs(e) {
      console.log(e);
      console.log(e.dataTransfer.files);
      let datas = e.dataTransfer.files;
      datas.forEach(item => {
        this.fileList.push(item);
      });
      this.readFile(this.fileList[this.fileList.length-1])

      e.stopPropagation();
      e.preventDefault();

      this.dt = "上传完成，可继续上传";
    }
  }
};
</script>

<style scoped></style>

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本文地址：https://blog.csdn.net/qq_42027681/article/details/114109519