更新前端静态网页获取方式，放弃使用后端获取api

frontend/node_modules/underscore/cjs/constant.js

@@ -0,0 +1,8 @@
+// Predicate-generating function. Often useful outside of Underscore.
+function constant(value) {
+  return function() {
+    return value;
+  };
+}
+
+module.exports = constant;