VUE base64转file

base64ToFile(base64, fileName) {let arr = base64.split(',');let mime = arr[0].match(/:(.*?);/)[1];let bytes = atob(arr[1]);let n = bytes.lengthlet ia = new Uint8Array(n);while (n--) {ia[n] = bytes.charCodeAt(n);}return new File([ia], fileName, { type: mime });
},