效果:

拖入文件前:

拖入文件后:

html:

<div id="select_frame">
	<div ref="select_frame" class="box">
		将文件拖拽到这里
	</div>
	<div class="filebox">
		<p v-if="fileList.length<1">暂无文件</p>
		<ol>
			<li v-for="item in fileList">{{item.name}}</li>
		</ol>
	</div>
	<button style="outline:none;float:right;"  type="submit" class="btn btn-primary">解 析</button>
</div>
	

js:

export default{
  name: 'patchCheck',
  data() {
    return {
      infoshow: false,
      fileList: [],
    };
  },
  mtehods: {

  },
  components: {
    layout: Layout,
  },
  mounted() {
    this.$refs.select_frame.ondragleave = (e) => {
      e.preventDefault();  //阻止离开时的浏览器默认行为
    };
    this.$refs.select_frame.ondrop = (e) => {
      e.preventDefault();    //阻止拖放后的浏览器默认行为
      const data = e.dataTransfer.files;  // 获取文件对象
      if (data.length < 1) {
        return;  // 检测是否有文件拖拽到页面     
      }
      console.log(e.dataTransfer.files);
      const formData = new FormData();
      for (let i = 0; i < e.dataTransfer.files.length; i++) {
        console.log(e.dataTransfer.files[i]);
        if (e.dataTransfer.files[i].name.indexOf('map') === -1) {
          alert('只允许上传.map文件');
          return;
        }
        formData.append('uploadfile', e.dataTransfer.files[i], e.dataTransfer.files[i].name);
      }
      this.fileList = this.fileList.concat(e.dataTransfer.files[0]);
      console.log(formData, this.fileList, e.dataTransfer.files[0]);
    };
    this.$refs.select_frame.ondragenter = (e) => {
      e.preventDefault();  //阻止拖入时的浏览器默认行为
      this.$refs.select_frame.border = '2px dashed red';
    };
    this.$refs.select_frame.ondragover = (e) => {
      e.preventDefault();    //阻止拖来拖去的浏览器默认行为
    };
  },

};

如果觉得我的文章对你有帮助,欢迎关注我的blog

相关知识点

【Javascript】深入理解async/await的实现,Generator+Promise = Async/Await
【Javascript】深入理解this作用域问题以及new运算符对this作用域的影响
【Javascript】手写运算符new创建实例并实现js继承