# pavloshaparenko/nodejscourse architecture > Architecture diagram of the GitHub repository pavloshaparenko/nodejscourse, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-25). It is an AI-made overview: check details against the source. - Interactive diagram: https://gitdiagram.com/pavloshaparenko/nodejscourse - Repository: https://github.com/pavloshaparenko/nodejscourse ## Overview This repository is a set of standalone Node.js course examples, not one integrated application. Its examples demonstrate event-loop scheduling, module systems, filesystem and path APIs, events, HTTP handling, streams, and a small Express server. The HTTP server is the clearest user-to-result workflow: a client request is routed to a handler, which returns content or reads and updates comment data. The README contains no capability details, so the map reflects the directory tree and sampled source; unsampled examples are shown only where their paths and purpose are evident. Main entry points: [`03-commonjs-modules/index.js`](https://github.com/pavloshaparenko/nodejscourse/blob/main/03-commonjs-modules/index.js) (CommonJS example), [`09-streams/copy-files-in-folder.mjs`](https://github.com/pavloshaparenko/nodejscourse/blob/main/09-streams/copy-files-in-folder.mjs) (Folder stream copy), [`08-http/handlers.js`](https://github.com/pavloshaparenko/nodejscourse/blob/main/08-http/handlers.js) (Request handlers), [`04-es6-modules/index.mjs`](https://github.com/pavloshaparenko/nodejscourse/blob/main/04-es6-modules/index.mjs) (ES module example) ## Diagram (Mermaid) ```mermaid flowchart TD subgraph group_scheduling["Runtime scheduling"] node_eventloop["Event-loop demo
[app.js]"] node_fibonacci["Fibonacci demos"] end subgraph group_modules["Modules and events"] node_cjs["CommonJS example
[index.js]"] node_cjs_exports["CommonJS exports"] node_cjs_single["Single export
[single-export.js]"] node_cjs_import["Re-export example"] node_esm["ES module example
[index.mjs]"] node_esm_default["Default export
[default-export.mjs]"] node_events["EventEmitter demo
[index.mjs]"] end subgraph group_io["Files and streams"] node_fs_demo["Filesystem example
[index.js]"] node_fs_promises["Promise filesystem
[promises-fs.js]"] node_fs_sync["Synchronous filesystem
[sync-fs.js]"] node_path_demo["Path utilities
[index.js]"] node_stream_copy["Folder stream copy"] node_stream_http["HTTP file stream"] node_stream_stdin["Standard I/O pipe"] node_stream_create["Create file stream
[create-file.mjs]"] node_stream_files["Sample input files"] node_stream_output["Copied files"] end subgraph group_web["HTTP examples"] node_http_client(("HTTP client")) node_http_server["HTTP router
[index.js]"] node_handlers["Request handlers
[handlers.js]"] node_comments[("Comments data
[data.js]")] node_comment_form["Comment form
[comment-form.html]"] node_express_client(("HTTP client")) node_express_app["Express example
[index.js]"] node_express["Express runtime"] end node_learner(("Learner")) node_learner -->|"runs demo"| node_eventloop node_learner -->|"runs demo"| node_fibonacci node_learner -->|"runs demo"| node_cjs node_cjs -->|"imports"| node_cjs_exports node_cjs -->|"imports"| node_cjs_single node_cjs -->|"imports"| node_cjs_import node_learner -->|"runs demo"| node_esm node_esm -->|"calls"| node_esm_default node_learner -->|"runs demo"| node_events node_learner -->|"runs demo"| node_fs_demo node_learner -->|"runs demo"| node_fs_promises node_learner -->|"runs demo"| node_fs_sync node_learner -->|"runs demo"| node_path_demo node_learner -->|"runs demo"| node_stream_copy node_stream_copy -->|"reads"| node_stream_files node_stream_copy -->|"writes"| node_stream_output node_learner -->|"runs demo"| node_stream_http node_learner -->|"runs demo"| node_stream_stdin node_learner -->|"runs demo"| node_stream_create node_http_client -->|"sends request"| node_http_server node_http_server -->|"dispatches"| node_handlers node_handlers -->|"reads and updates"| node_comments node_handlers -->|"reads"| node_comment_form node_express_client -->|"sends request"| node_express_app node_express_app -->|"uses"| node_express click node_eventloop "https://github.com/pavloshaparenko/nodejscourse/blob/main/01-event-loop-events/app.js" click node_fibonacci "https://github.com/pavloshaparenko/nodejscourse/blob/main/02-blocking-event-loop/fibonacci-with-cache.js" click node_cjs "https://github.com/pavloshaparenko/nodejscourse/blob/main/03-commonjs-modules/index.js" click node_cjs_exports "https://github.com/pavloshaparenko/nodejscourse/blob/main/03-commonjs-modules/multiple-exports.js" click node_cjs_single "https://github.com/pavloshaparenko/nodejscourse/blob/main/03-commonjs-modules/my-modules/single-export.js" click node_cjs_import "https://github.com/pavloshaparenko/nodejscourse/blob/main/03-commonjs-modules/export-and-import.js" click node_esm "https://github.com/pavloshaparenko/nodejscourse/blob/main/04-es6-modules/index.mjs" click node_esm_default "https://github.com/pavloshaparenko/nodejscourse/blob/main/04-es6-modules/default-export.mjs" click node_events "https://github.com/pavloshaparenko/nodejscourse/blob/main/06-events/index.mjs" click node_fs_demo "https://github.com/pavloshaparenko/nodejscourse/blob/main/05-fs/index.js" click node_fs_promises "https://github.com/pavloshaparenko/nodejscourse/blob/main/05-fs/promises-fs.js" click node_fs_sync "https://github.com/pavloshaparenko/nodejscourse/blob/main/05-fs/sync-fs.js" click node_path_demo "https://github.com/pavloshaparenko/nodejscourse/blob/main/07-path/index.js" click node_stream_copy "https://github.com/pavloshaparenko/nodejscourse/blob/main/09-streams/copy-files-in-folder.mjs" click node_stream_http "https://github.com/pavloshaparenko/nodejscourse/blob/main/09-streams/http-stream-file.mjs" click node_stream_stdin "https://github.com/pavloshaparenko/nodejscourse/blob/main/09-streams/stdin-pipe-stdout.mjs" click node_stream_create "https://github.com/pavloshaparenko/nodejscourse/blob/main/09-streams/create-file.mjs" click node_stream_files "https://github.com/pavloshaparenko/nodejscourse/tree/main/09-streams/files" click node_stream_output "https://github.com/pavloshaparenko/nodejscourse/tree/main/09-streams/copied-files" click node_http_server "https://github.com/pavloshaparenko/nodejscourse/blob/main/08-http/index.js" click node_handlers "https://github.com/pavloshaparenko/nodejscourse/blob/main/08-http/handlers.js" click node_comments "https://github.com/pavloshaparenko/nodejscourse/blob/main/08-http/data.js" click node_comment_form "https://github.com/pavloshaparenko/nodejscourse/blob/main/08-http/files/comment-form.html" click node_express_app "https://github.com/pavloshaparenko/nodejscourse/blob/main/10-npm/index.js" classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554 classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337 classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81 classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a class node_eventloop,node_fibonacci toneBlue class node_cjs,node_cjs_exports,node_cjs_single,node_cjs_import,node_esm,node_esm_default,node_events toneAmber class node_fs_demo,node_fs_promises,node_fs_sync,node_path_demo,node_stream_copy,node_stream_http,node_stream_stdin,node_stream_create,node_stream_files,node_stream_output toneMint class node_http_client,node_http_server,node_handlers,node_comments,node_comment_form,node_express_client,node_express_app,node_express toneRose class node_learner toneIndigo ``` ## Components ### Runtime scheduling - [Event-loop demo](https://github.com/pavloshaparenko/nodejscourse/blob/main/01-event-loop-events/app.js): `01-event-loop-events/app.js` - [Fibonacci demos](https://github.com/pavloshaparenko/nodejscourse/blob/main/02-blocking-event-loop/fibonacci-with-cache.js): `02-blocking-event-loop/fibonacci-with-cache.js` ### Modules and events - [CommonJS example](https://github.com/pavloshaparenko/nodejscourse/blob/main/03-commonjs-modules/index.js): `03-commonjs-modules/index.js` - [CommonJS exports](https://github.com/pavloshaparenko/nodejscourse/blob/main/03-commonjs-modules/multiple-exports.js): `03-commonjs-modules/multiple-exports.js` - [Single export](https://github.com/pavloshaparenko/nodejscourse/blob/main/03-commonjs-modules/my-modules/single-export.js): `03-commonjs-modules/my-modules/single-export.js` - [Re-export example](https://github.com/pavloshaparenko/nodejscourse/blob/main/03-commonjs-modules/export-and-import.js): `03-commonjs-modules/export-and-import.js` - [ES module example](https://github.com/pavloshaparenko/nodejscourse/blob/main/04-es6-modules/index.mjs): `04-es6-modules/index.mjs` - [Default export](https://github.com/pavloshaparenko/nodejscourse/blob/main/04-es6-modules/default-export.mjs): `04-es6-modules/default-export.mjs` - [EventEmitter demo](https://github.com/pavloshaparenko/nodejscourse/blob/main/06-events/index.mjs): `06-events/index.mjs` ### Files and streams - [Filesystem example](https://github.com/pavloshaparenko/nodejscourse/blob/main/05-fs/index.js): `05-fs/index.js` - [Promise filesystem](https://github.com/pavloshaparenko/nodejscourse/blob/main/05-fs/promises-fs.js): `05-fs/promises-fs.js` - [Synchronous filesystem](https://github.com/pavloshaparenko/nodejscourse/blob/main/05-fs/sync-fs.js): `05-fs/sync-fs.js` - [Path utilities](https://github.com/pavloshaparenko/nodejscourse/blob/main/07-path/index.js): `07-path/index.js` - [Folder stream copy](https://github.com/pavloshaparenko/nodejscourse/blob/main/09-streams/copy-files-in-folder.mjs): `09-streams/copy-files-in-folder.mjs` - [HTTP file stream](https://github.com/pavloshaparenko/nodejscourse/blob/main/09-streams/http-stream-file.mjs): `09-streams/http-stream-file.mjs` - [Standard I/O pipe](https://github.com/pavloshaparenko/nodejscourse/blob/main/09-streams/stdin-pipe-stdout.mjs): `09-streams/stdin-pipe-stdout.mjs` - [Create file stream](https://github.com/pavloshaparenko/nodejscourse/blob/main/09-streams/create-file.mjs): `09-streams/create-file.mjs` - [Sample input files](https://github.com/pavloshaparenko/nodejscourse/tree/main/09-streams/files): `09-streams/files` - [Copied files](https://github.com/pavloshaparenko/nodejscourse/tree/main/09-streams/copied-files): `09-streams/copied-files` ### HTTP examples - **HTTP client** - [HTTP router](https://github.com/pavloshaparenko/nodejscourse/blob/main/08-http/index.js): `08-http/index.js` - [Request handlers](https://github.com/pavloshaparenko/nodejscourse/blob/main/08-http/handlers.js): `08-http/handlers.js` - [Comments data](https://github.com/pavloshaparenko/nodejscourse/blob/main/08-http/data.js): `08-http/data.js` - [Comment form](https://github.com/pavloshaparenko/nodejscourse/blob/main/08-http/files/comment-form.html): `08-http/files/comment-form.html` - **HTTP client** - [Express example](https://github.com/pavloshaparenko/nodejscourse/blob/main/10-npm/index.js): `10-npm/index.js` - **Express runtime** ### Other components - **Learner** ## Connections - Learner → Event-loop demo: runs demo - Learner → Fibonacci demos: runs demo - Learner → CommonJS example: runs demo - CommonJS example → CommonJS exports: imports - CommonJS example → Single export: imports - CommonJS example → Re-export example: imports - Learner → ES module example: runs demo - ES module example → Default export: calls - Learner → EventEmitter demo: runs demo - Learner → Filesystem example: runs demo - Learner → Promise filesystem: runs demo - Learner → Synchronous filesystem: runs demo - Learner → Path utilities: runs demo - Learner → Folder stream copy: runs demo - Folder stream copy → Sample input files: reads - Folder stream copy → Copied files: writes - Learner → HTTP file stream: runs demo - Learner → Standard I/O pipe: runs demo - Learner → Create file stream: runs demo - HTTP client → HTTP router: sends request - HTTP router → Request handlers: dispatches - Request handlers → Comments data: reads and updates - Request handlers → Comment form: reads - HTTP client → Express example: sends request - Express example → Express runtime: uses