前端Vue2获取上传文件的MD5

<template>
  <input id="upload" type="file" />
</template>
<script>
import BMF from "browser-md5-file"; //npm i browser-md5-file -S
export default {
  mounted() {
    const el = document.getElementById("upload");
    const bmf = new BMF();
 
    el.addEventListener("change", handle, false);
 
    function handle(e) {
      const file = e.target.files[0];
      bmf.md5(
        file,
        (err, md5) => {
          console.log("err:", err);
          console.log("md5 string:", md5);
        },
        (progress) => {
          console.log("progress number:", progress);
        }
      );
    }
  },
};
</script>