Book Image

TypeScript Blueprints

By : Ivo Gabe de Wolff
Book Image

TypeScript Blueprints

By: Ivo Gabe de Wolff

Overview of this book

TypeScript is the future of JavaScript. Having been designed for the development of large applications, it is now being widely incorporated in cutting-edge projects such as Angular 2. Adopting TypeScript results in more robust software - software that is more scalable and performant. It's scale and performance that lies at the heart of every project that features in this book. The lessons learned throughout this book will arm you with everything you need to build some truly amazing projects. You'll build a complete single page app with Angular 2, create a neat mobile app using NativeScript, and even build a Pac Man game with TypeScript. As if fun wasn't enough, you'll also find out how to migrate your legacy codebase from JavaScript to TypeScript. This book isn't just for developers who want to learn - it's for developers who want to develop. So dive in and get started on these TypeScript projects.
Table of Contents (16 chapters)
TypeScript Blueprints
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

Adding CRUD operations


Most servers handle CRUD operations primarily. Our server must handle five different requests: list all notes of the current user, find a specific note, insert a new note, update a note, and remove a note.

First, we add a helper function that can be used on the server side and the client side. In lib/shared/note.ts, we add a function that returns the title of a note—the first line, if available, or "Untitled":

export function getTitle(content: string) { 
  const lineEnd = content.indexOf("\n"); 
  if (content === "" || lineEnd === 0) { 
    return "Untitled"; 
  } 
  if (lineEnd === -1) { 
    // Note contains one line 
    return content; 
  } 
  // Get first line 
  return content.substring(0, lineEnd); 
} 

We write the CRUD functions in lib/server/note.ts. We start with imports and the Note definition:

import { ServerRequest, ServerResponse, ServerError, StatusCode, validate } from "phaethon"; 
import...