отслеживать изменение json.js

сервер.js

@@ -0,0 +1,62 @@
+const fs = require("fs");
+const http = require("http");
+const path = require("path");
+
+var jsonUpdates = {};
+
+const srv = http.createServer(process);
+srv.listen(8000);
+fs.watch(__dirname, trackJSONUpdates);
+
+function process(req, res)
+{
+    var fileName = "." + decodeURI(req.url);
+    if (fileName == "./")
+    {
+        fileName = "./index.html";
+    }
+    else if (fileName == "./json.js")
+    {
+        const content = Object.keys(jsonUpdates).sort().join("\n");
+        jsonUpdates = {};
+        res.writeHead(200);
+        res.end(content, "utf-8");
+        return;
+    }
+console.debug("fileName:", fileName);
+    const ext = path.extname(fileName);
+    var contentType = "text/html";
+    switch (ext)
+    {
+        case ".js":
+            contentType = "text/javascript";
+            break;
+        case "png":
+            contentType = "image/png";
+            break;
+        case "jpg":
+            contentType = "image/jpg";
+            break;
+    }
+    fs.readFile(fileName, function(err, content) {
+        if (err)
+        {
+            res.writeHead(500);
+            res.end(err.code);
+            return;
+        }
+        res.writeHead(200, { "Content-Type": contentType });
+        res.end(content, "utf-8");
+    });
+}
+
+function trackJSONUpdates(eventName, fileName)
+{
+    if (!fileName.endsWith("json.js"))
+    {
+        return;
+    }
+    jsonUpdates[fileName] = true;
+console.debug("fileName", fileName);
+}
+