TypeScript Lab: Nested Object Inspector

LAB / EXPLORATION

TypeScript Lab: Nested Object Inspector

Planned

LAB 017 — TypeScript Data Modeling
Expand nested typed objects into a visual hierarchy.

LAB TypeScript Lab: Nested Object Inspector Preview coming soon

LAB 017

TypeScript Lab: Nested Object Inspector

Concept

Interfaces can contain other interfaces to model structured nested data.

Concept

Interfaces can contain other interfaces to model structured nested data.

Objective & Explanation

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

Learning Target

Objective

Expand nested typed objects into a visual hierarchy.

Explanation

Interfaces can contain other interfaces to model structured nested data.

Project Plan

Structure, technologies, data boundary, and source connection.

Structure

project/
├── package.json
├── tsconfig.json
├── index.html
├── styles.css
└── src/
    └── app.ts

Technologies

TypeScript
HTML
CSS
JSON

Data Layer

Use a small local object, array, or JSON fixture so the transformation stays visible.

Sandbox Source

src/datastore/types.ts

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.

interface Technology { name: string }
interface Project {
  title: string;
  technologies: Technology[];
}

const project: Project = {
  title: "Sandbox",
  technologies: [{ name: "TypeScript" }],
};

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: expand nested typed objects into a visual hierarchy.

Data: JSON