更新前端静态网页获取方式，放弃使用后端获取api

frontend/node_modules/core-js/modules/es.number.is-integer.js

@@ -0,0 +1,9 @@
+'use strict';
+var $ = require('../internals/export');
+var isIntegralNumber = require('../internals/is-integral-number');
+
+// `Number.isInteger` method
+// https://tc39.es/ecma262/#sec-number.isinteger
+$({ target: 'Number', stat: true }, {
+  isInteger: isIntegralNumber
+});