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/2021/IteratorStep.js

@@ -0,0 +1,13 @@
+'use strict';
+
+var IteratorComplete = require('./IteratorComplete');
+var IteratorNext = require('./IteratorNext');
+
+// https://262.ecma-international.org/6.0/#sec-iteratorstep
+
+module.exports = function IteratorStep(iterator) {
+	var result = IteratorNext(iterator);
+	var done = IteratorComplete(result);
+	return done === true ? false : result;
+};
+