TypeScript Lab: package-lock Dependency Tree

LAB / EXPLORATION

TypeScript Lab: package-lock Dependency Tree

Planned

LAB 006 — TypeScript Toolchain
Display locked package versions as a dependency tree.

LAB TypeScript Lab: package-lock Dependency Tree Preview coming soon

LAB 006

TypeScript Lab: package-lock Dependency Tree

Concept

package-lock.json records the exact dependency graph npm resolved.

Concept

package-lock.json records the exact dependency graph npm resolved.

Objective & Explanation

What the project should make visible and why the concept matters.

Learning Target

Objective

Display locked package versions as a dependency tree.

Explanation

package-lock.json records the exact dependency graph npm resolved.

Project Plan

Structure, technologies, data boundary, and source connection.

Structure

project/
├── package.json
├── package-lock.json
├── tsconfig.json
├── index.html
└── src/
    └── app.ts

Technologies

TypeScript
Node.js
npm

Data Layer

No persistent data layer. Keep all demonstration values inside the standalone project.

Sandbox Source

package-lock.json

Build Instructions

Build only the focused behavior, then use the visual layer to inspect it.

Setup

Create the standalone project folder and listed files.

Implement

Implement the smallest version that demonstrates the concept.

Run & Inspect

Change one input and observe the visible output change.

Code & Configuration

Starter configuration plus the focused implementation example.

Focused TypeScript

Implement this behavior first, then alter the input.

type LockedPackage = { name: string; version: string; requires?: string[] };

const tree: LockedPackage[] = [
  { name: "app", version: "1.0.0", requires: ["typescript"] },
  { name: "typescript", version: "7.0.2" },
];

Starter Configuration

Keep the project independently buildable.

package.json

{
  "type": "module",
  "scripts": { "build": "tsc" },
  "devDependencies": { "typescript": "^7.0.2" }
}

tsconfig.json

{
  "compilerOptions": {
    "rootDir": "./src",
    "outDir": "./dist",
    "target": "ES2022",
    "module": "ES2022",
    "lib": ["ES2022", "DOM"],
    "strict": true,
    "sourceMap": true
  },
  "include": ["src/**/*.ts"]
}

Expected Visual Result

The output is the proof that the concept is working.

Visible Proof

The browser should visibly demonstrate: display locked package versions as a dependency tree.

Data: None