TypeScript Lab: Numbered Position Generator

LAB / EXPLORATION

TypeScript Lab: Numbered Position Generator

Planned

LAB 030 — Data Transformation
Generate padded node and child position classes.

LAB TypeScript Lab: Numbered Position Generator Preview coming soon

LAB 030

TypeScript Lab: Numbered Position Generator

Concept

String padding converts zero-based indexes into readable ordered class names.

Concept

String padding converts zero-based indexes into readable ordered class names.

Objective & Explanation

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

Learning Target

Objective

Generate padded node and child position classes.

Explanation

String padding converts zero-based indexes into readable ordered class names.

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/generator/generate.ts → positionClass()

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.

function positionClass(prefix: "node" | "child", index: number): string {
  return `${prefix}-${String(index + 1).padStart(2, "0")}`;
}

positionClass("node", 0); // node-01

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: generate padded node and child position classes.

Data: None