TypeScript Lab: DOM and Node Library Map

LAB / EXPLORATION

TypeScript Lab: DOM and Node Library Map

Planned

LAB 009 — TypeScript Toolchain
Separate browser APIs from Node APIs in compiler configuration.

LAB TypeScript Lab: DOM and Node Library Map Preview coming soon

LAB 009

TypeScript Lab: DOM and Node Library Map

Concept

Compiler libraries and type packages determine which platform APIs TypeScript recognizes.

Concept

Compiler libraries and type packages determine which platform APIs TypeScript recognizes.

Objective & Explanation

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

Learning Target

Objective

Separate browser APIs from Node APIs in compiler configuration.

Explanation

Compiler libraries and type packages determine which platform APIs TypeScript recognizes.

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

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 browserElement: HTMLElement = document.body;
const nodeVersion: string = process.version;

console.log(browserElement.tagName);
console.log(nodeVersion);

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: separate browser APIs from Node APIs in compiler configuration.

Data: None