获取文件夹下的所有文件 （以下方法简单的展示base64图片,没任何判断）
files：是所有的文件

vue2的拆一下照样用

<input type="file" v-on:change="handleFile" directory webkitDirectory>
    <img v-for="i in imgList" :key="i" :src="i" alt="" style="width:100px;height:100px">
    
//js
const imgList = ref([])
const handleFile = (e) => {
  const fileInput = e.target;
  const files = fileInput.files;
  const fileList = [];
  console.log(files)
  files.forEach(ele => {
    const file = ele;
    const reader = new FileReader();
    reader.onload = function () {
      imgList.value.push(reader.result)
    }
    reader.readAsDataURL(ele);
  });
} 

获取本地图片base64

 <input type="file" v-on:change="handleFile3">
    <div v-if="fileContent3">
      <img v-bind:src="fileContent3" style="width:100px;height:100px">
    </div>

//js
import { reactive, ref, toRef, toRefs, watch } from "vue";
const fileContent3 = ref()
function handleFile3(e) {
  const self = this;
  const fileInput = e.target;
  const file = fileInput.files[0];
  const reader = new FileReader();
  reader.onload = function () {
    fileContent3.value = reader.result;
  }
  reader.readAsDataURL(file);
}