TypeScript Project: Database Table Viewer

GENERAL PROJECT

TypeScript Project: Database Table Viewer

Planned

PROJECT 057 — SQLite & Data Access
Choose an allowed table and render its rows.

Project TypeScript Project: Database Table Viewer Preview coming soon

PROJECT 057

TypeScript Project: Database Table Viewer

Concept

A controlled table list prevents arbitrary table names from entering SQL.

Concept

A controlled table list prevents arbitrary table names from entering SQL.

Objective & Explanation

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

Learning Target

Objective

Choose an allowed table and render its rows.

Explanation

A controlled table list prevents arbitrary table names from entering SQL.

Project Plan

Structure, technologies, data boundary, and source connection.

Structure

project/
├── package.json
├── tsconfig.json
├── index.html
├── styles.css
├── data/
│   └── learning.db
└── src/
    ├── client.ts
    └── server.ts

Technologies

TypeScript
Node.js
SQLite
HTML
CSS

Data Layer

Use SQLite learning rows. Isolate destructive practice from important Sandbox records.

Sandbox Source

src/local-editor/server.ts → getTableRows()

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

Render the returned or changed data in the browser.

Code & Configuration

Starter configuration plus the focused implementation example.

Focused TypeScript

Implement this behavior first, then alter the input.

const ALLOWED_TABLES = new Set(["records", "categories", "technologies"]);

function getRows(table: string) {
  if (!ALLOWED_TABLES.has(table)) throw new Error("Table not allowed");
  return database.prepare(`SELECT * FROM ${table} LIMIT 100`).all();
}

Starter Configuration

Keep the project independently buildable.

package.json

{
  "type": "module",
  "scripts": {
    "build": "tsc",
    "start": "npm run build && node --enable-source-maps dist/server.js"
  },
  "devDependencies": {
    "@types/node": "^26.4.0",
    "typescript": "^7.0.2"
  }
}

tsconfig.json

{
  "compilerOptions": {
    "rootDir": "./src",
    "outDir": "./dist",
    "target": "ES2022",
    "module": "ES2022",
    "lib": ["ES2022", "DOM"],
    "types": ["node"],
    "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: choose an allowed table and render its rows.

Data: SQLite