TypeScript Lab: Object to Form

LAB / EXPLORATION

Planned

LAB 063 — Browser State
Populate form controls from a loaded record object.

LAB TypeScript Lab: Object to Form Preview coming soon

LAB 063

TypeScript Lab: Object to Form

Concept

A mapping function transfers object properties into corresponding form controls.

Concept

A mapping function transfers object properties into corresponding form controls.

Objective & Explanation

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

Learning Target

Objective

Populate form controls from a loaded record object.

Explanation

A mapping function transfers object properties into corresponding form controls.

Project Plan

Structure, technologies, data boundary, and source connection.

Structure

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

Technologies

TypeScript
DOM
HTML
CSS
JSON

Data Layer

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

Sandbox Source

src/local-editor/client.ts → fillEntryForm()

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 fillForm(record: RecordRow): void {
  titleInput.value = record.title;
  slugInput.value = record.slug ?? "";
  statusSelect.value = record.status ?? "planned";
}

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: populate form controls from a loaded record object.

Data: JSON