diff --git a/JavaScript/5-api.js b/JavaScript/5-api.js
new file mode 100644
index 0000000..a8fb98d
--- /dev/null
+++ b/JavaScript/5-api.js
@@ -0,0 +1,41 @@
+'use strict';
+
+const http = require('http');
+
+const ajax = (base, methods) => {
+  const api = {};
+  for (const method of methods) {
+    api[method] = (...args) => {
+      const callback = args.pop();
+      const url = base + method + '/' + args.join('/');
+      console.log(url);
+      http.get(url, res => {
+        if (res.statusCode !== 200) {
+          callback(new Error(`Status Code: ${res.statusCode}`));
+          return;
+        }
+        const lines = [];
+        res.on('data', chunk => lines.push(chunk));
+        res.on('end', () => callback(null, JSON.parse(lines.join())));
+      });
+    };
+  }
+  return api;
+};
+
+// Usage
+
+const api = ajax(
+  'http://localhost:8000/api/',
+  ['user', 'userBorn']
+);
+
+api.user('marcus', (err, data) => {
+  if (err) throw err;
+  console.dir({ data });
+});
+
+api.userBorn('mao', (err, data) => {
+  if (err) throw err;
+  console.dir({ data });
+});
diff --git a/JavaScript/5-server.js b/JavaScript/5-server.js
new file mode 100644
index 0000000..d033718
--- /dev/null
+++ b/JavaScript/5-server.js
@@ -0,0 +1,21 @@
+'use strict';
+
+const http = require('http');
+
+const users = {
+  marcus: { name: 'Marcus Aurelius', city: 'Rome', born: 121 },
+  mao: { name: 'Mao Zedong', city: 'Shaoshan', born: 1893 },
+};
+
+const routing = {
+  '/api/user': name => users[name],
+  '/api/userBorn': name => users[name].born
+};
+
+http.createServer((req, res) => {
+  const url = req.url.split('/');
+  const par = url.pop();
+  const method = routing[url.join('/')];
+  const result = method ? method(par) : { error: 'not found' };
+  res.end(JSON.stringify(result));
+}).listen(8000);