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/2015/SecFromTime.js

@@ -0,0 +1,14 @@
+'use strict';
+
+var floor = require('./floor');
+var modulo = require('./modulo');
+
+var timeConstants = require('../helpers/timeConstants');
+var msPerSecond = timeConstants.msPerSecond;
+var SecondsPerMinute = timeConstants.SecondsPerMinute;
+
+// https://262.ecma-international.org/5.1/#sec-15.9.1.10
+
+module.exports = function SecFromTime(t) {
+	return modulo(floor(t / msPerSecond), SecondsPerMinute);
+};