How asif-mahmud/js-utils works
1. Repository type
- This is a small TypeScript utility library, not an application server or frontend app.
- Its main output is a published npm package: @gswag/js-utils.
2. Primary responsibility
- The library provides a few focused helpers:
- flatten
- unflatten
- numberToBanglaWords
- ObjectType
- The README frames it as a general-purpose “collection of some utility functions for javascript/typescript.”
3. Source-of-truth layer
- All authored code lives under src/.
- Each utility has its own implementation file, and the package root is wired through src/index.ts as the public export surface.
- Tests are colocated in the same folder with *.spec.ts files.
4. Core functional subsystems
- Object structure utilities: flatten.ts and unflatten.ts transform nested objects to/from flattened key paths.
- Localization/formatting utility: number-to-bangla-words.ts converts numeric values into Bangla words.
- Shared typing support: object-type.ts likely defines internal or exported type helpers used by the other modules.
5. Public API boundary
- The package consumer should import from the module entrypoint rather than individual internals.
- The built entrypoint is mirrored in lib/esm/index.js and lib/esm/index.d.ts, which expose the compiled runtime and type definitions.
6. Build output layer
- Compiled artifacts are checked into lib/esm/.
- This indicates the repository ships a prebuilt ES module distribution, with both JavaScript and .d.ts type declarations.
- The lib/tsconfig.tsbuildinfo file suggests TypeScript incremental build caching is used during compilation.
7. Testing and verification flow
- Tests are written with Jest and live beside the source in src/*.spec.ts.
- The repository includes jest.config.js, and the GitHub Actions workflow test-and-check-coverage.yml runs tests plus coverage validation.
- This creates a clear quality gate before changes are accepted.
8. Documentation generation
- The docs/ directory contains a generated static site with HTML pages for functions and types.
- typedoc.json strongly suggests the docs are produced with TypeDoc from the TypeScript sources.
- The docs are suitable for GitHub Pages hosting, reinforced by the presence of .nojekyll.
9. Package distribution model
- package.json and package-lock.json define the npm package metadata and dependency resolution.
- The repo is structured to support publishing a library rather than deploying a service: source, tests, generated docs, and precompiled distribution are all present.
10. Architecture at a glance
- Flow is roughly: TypeScript source in src/ → test/verify with Jest → compile to lib/esm/ → publish as npm package → generate static API docs into docs/.
- GitHub Actions provides CI, and GitHub Pages appears to host the docs.
Main entry points: index.ts Public API · src Specs · object-type.ts ObjectType · package.json Package manifest
Components 19
Source
Authored TypeScript utilities and test colocations.
- Public API · Main export surface for package consumers.
src/index.ts - Flatten · Transforms nested objects into flattened key paths.
src/flatten.ts - Unflatten · Rebuilds nested objects from flattened paths.
src/unflatten.ts - Bangla words · Converts numbers into Bangla words.
src/number-to-bangla-words.ts - ObjectType · Shared object typing helpers used by the utilities.
src/object-type.ts - Specs · Colocated test files validating the utility behavior.
src
Distribution
Prebuilt ESM package artifacts checked into the repo.
- ESM entry · Compiled runtime entrypoint for package consumers.
lib/esm/index.js - Built utils · Compiled JavaScript implementations of the utilities.
lib/esm/flatten.js - Type defs · Compiled declaration files published with the ESM build.
lib/esm/index.d.ts - Build cache · TypeScript incremental build metadata.
lib/tsconfig.tsbuildinfo
Docs
Generated TypeDoc site for public API reference.
- Docs site · Generated static documentation site.
docs/index.html - Function docs · API reference pages for exported functions.
docs/functions/flatten.html - Type docs · API reference page for exported types.
docs/types/ObjectType.html - TypeDoc config · Configuration used to generate the static docs.
typedoc.json
Quality
Test and CI configuration for verification.
- Jest config · Jest setup for running the source specs.
jest.config.js - CI workflow · Runs tests and coverage checks in GitHub Actions.
.github/workflows/test-and-check-coverage.yml
Package
Repository-level build and release metadata.
- Package manifest · Package metadata and dependency definitions.
package.json - Lockfile · Pinned dependency resolution for the package.
package-lock.json - TS config · Compiler configuration for the library build.
tsconfig.json
Connections 27
- Public API → Flatten: exports · Public entrypoint re-exports flatten.
- Public API → Unflatten: exports · Public entrypoint re-exports unflatten.
- Public API → Bangla words: exports · Public entrypoint re-exports number-to-bangla-words.
- Public API → ObjectType: exports · Public entrypoint re-exports shared types.
- Flatten → ObjectType: uses · Flatten relies on shared object typing.
- Unflatten → ObjectType: uses · Unflatten relies on shared object typing.
- Specs → Flatten: tests · Specs validate flatten behavior.
- Specs → Unflatten: tests · Specs validate unflatten behavior.
- Specs → Bangla words: tests · Specs validate number-to-Bangla-words behavior.
- Specs → ObjectType: covers · Tests indirectly exercise shared typing contracts.
- Public API → ESM entry: builds to · Source entrypoint compiles into the published ESM entry.
- Flatten → Built utils: builds to · Source utility compiles into ESM output.
- Unflatten → Built utils: builds to · Source utility compiles into ESM output.
- Bangla words → Built utils: builds to · Source utility compiles into ESM output.
- ObjectType → Type defs: builds to · Source types compile into declaration files.
- TypeDoc config → Docs site: generates · TypeDoc configuration produces the static docs site.
- Public API → Function docs: documents · TypeDoc renders function API pages from source exports.
- ObjectType → Type docs: documents · TypeDoc renders type reference pages.
- Jest config → Specs: runs · Jest configuration drives the colocated specs.
- CI workflow → Jest config: uses · CI invokes the Jest test setup.
- CI workflow → Specs: verifies · Workflow runs the test suite and coverage checks.
- Package manifest → Public API: publishes · Package manifest exposes the library entrypoint.
- Package manifest → ESM entry: packages · npm package ships the compiled ESM entry.
- Package manifest → Type defs: packages · npm package ships declaration files.
- Package manifest → Lockfile: pins · Lockfile fixes dependency resolution for installs.
- TS config → Public API: compiles · TypeScript configuration drives library compilation.
- TS config → Build cache: caches · Incremental build metadata is produced by the compiler.