From eca347cc4e029339c950f2c5a9583a721ef5c378 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9E=AB=E8=B0=B7=E5=89=91=E4=BB=99?= <mapaler@163.com>
Date: Tue, 20 Jul 2021 20:53:57 +0800
Subject: [PATCH] =?UTF-8?q?=E5=8A=A0=E4=B8=A4=E4=B8=AA=E5=87=BD=E6=95=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 script-universal_function.js | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/script-universal_function.js b/script-universal_function.js
index 04f1e42c..5b41b58c 100644
--- a/script-universal_function.js
+++ b/script-universal_function.js
@@ -45,6 +45,7 @@ function getQueryString(name, url) {
 	return value;
 }
 
+
 //数字补前导0
 Number.prototype.prefixInteger = function(length, useGrouping = false) {
 	return this.toLocaleString(undefined, {
@@ -57,6 +58,28 @@ String.prototype.prefix = function(length = 2, prefix = '0') {
 	let needAddLength = Math.max(length - this.length, 0);
 	return new Array(needAddLength).fill(prefix).join('') + this;
 }
+
+// 将字符串转为Base64
+String.prototype.toBinary = function() {
+	const charCodes16Arr = [...this].map(char=>char.charCodeAt(0));
+	const codeUnits = new Uint16Array(charCodes16Arr);
+	const charCodes = new Uint8Array(codeUnits.buffer);
+	const result = [...charCodes].map(code=>String.fromCharCode(code)).join('');
+	return result;
+}
+String.prototype.toBase64 = function() {
+	return btoa(this.toBinary());
+}
+String.fromBinary = function(binary) {
+	const bytes = new Uint8Array([...binary].map(char=>char.charCodeAt(0)));
+	const charCodes = new Uint16Array(bytes.buffer);
+	const result = [...charCodes].map(code=>String.fromCharCode(code)).join('');
+	return result;
+}
+String.fromBase64 = function(base64) {
+	return String.fromBinary(atob(base64));
+}
+
 //大数字缩短长度，默认返回本地定义字符串
 Number.prototype.bigNumberToString = function() {
 	return this.toLocaleString();