TypeScript Lab: Required vs Optional

LAB / EXPLORATION

TypeScript Lab: Required vs Optional

Planned

LAB 013 — TypeScript Data Modeling
Show required properties and optional properties in a form.

LAB TypeScript Lab: Required vs Optional Preview coming soon

LAB 013

TypeScript Lab: Required vs Optional

Concept

Question-mark properties may be absent while required properties must exist.

Concept

Question-mark properties may be absent while required properties must exist.

Objective & Explanation

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

Learning Target

Objective

Show required properties and optional properties in a form.

Explanation

Question-mark properties may be absent while required properties must exist.

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

Data Layer

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

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 Project {
  id: string;
  title: string;
  description?: string;
}

const project: Project = {
  id: "bird-game",
  title: "Bird Game",
};

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: show required properties and optional properties in a form.

Data: None