TypeScript Lab: Hello TypeScript Browser

LAB / EXPLORATION

TypeScript Lab: Hello TypeScript Browser

Planned

LAB 001 — TypeScript Toolchain
Compile TypeScript and display its result in a browser.

LAB TypeScript Lab: Hello TypeScript Browser Preview coming soon

LAB 001

TypeScript Lab: Hello TypeScript Browser

Concept

TypeScript source compiles to JavaScript that the browser executes.

Concept

TypeScript source compiles to JavaScript that the browser executes.

Objective & Explanation

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

Learning Target

Objective

Compile TypeScript and display its result in a browser.

Explanation

TypeScript source compiles to JavaScript that the browser executes.

Project Plan

Structure, technologies, data boundary, and source connection.

Structure

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

Technologies

TypeScript
Node.js
npm
HTML
CSS

Data Layer

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

Sandbox Source

package.json, tsconfig.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.

const message: string = "TypeScript is running";
document.querySelector("#output")!.textContent = message;

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: compile TypeScript and display its result in a browser.

Data: None