更新前端静态网页获取方式，放弃使用后端获取api

frontend/node_modules/es-abstract/2018/ToInt16.js

@@ -0,0 +1,10 @@
+'use strict';
+
+var ToUint16 = require('./ToUint16');
+
+// https://262.ecma-international.org/6.0/#sec-toint16
+
+module.exports = function ToInt16(argument) {
+	var int16bit = ToUint16(argument);
+	return int16bit >= 0x8000 ? int16bit - 0x10000 : int16bit;
+};