Chapter 10: Building a Project from Scratch

Planning and Setting Up Your Project

To start a project, you'll need to initialize a new project directory, and install any necessary dependencies. Depending on the framework, the setup process may differ:

Next.js

Start a new Next.js project:

npx create-next-app@latest my-app
cd my-app

Remix

Start a new Remix project:

npx create-remix@latest my-app
# follow the prompts to configure your Remix app
cd my-app

Gatsby

Start a new Gatsby site:

npm install -g gatsby-cli
gatsby new my-app
cd my-app

Angular

Start a new Angular application:

npm install -g @angular/cli
ng new my-app
cd my-app

Vue.js

Start a new Vue.js project:

npm install -g @vue/cli
vue create my-app
cd my-app

Implementing Features

In your App component (or equivalent), display a "Hello, World!" message. Here's how you can do this in each framework:

Next.js

In pages/index.js:

function HomePage() {
  return <h1>Hello, World!</h1>
}

export default HomePage;

Remix

In app/routes/_index.jsx:

export const meta = () => {
  return [
    { title: "New Remix App" },
    { name: "description", content: "Welcome to Remix!" },
  ];
};

export default function Index() {
  return (
    <div>
      <h1>Hello World!</h1>
    </div>
  );
}

Gatsby

In src/pages/index.js:

import React from "react"

const IndexPage = () => <h1>Hello, World!</h1>

export default IndexPage

Angular

In src/app/app.component.ts:

import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  template: `<h1>Hello, World!</h1>`,
})
export class AppComponent {}

Vue.js

In src/App.vue:

<template>
  <h1>Hello, World!</h1>
</template>

Debugging and Testing Your Project

For testing, Jest is commonly used in all frameworks for unit testing but Angular, which uses Jasmine. Cypress is used for end-to-end testing in all. Here is how to install Jest and Cypress, and a sample test for each:

Jest

Install Jest:

npm install --save-dev jest

A simple Jest test (App.test.js) could look like this:

test('displays hello world', () => {
  const message = "Hello, World!";
  expect(message).toBe("Hello, World!");
});

To run your Jest tests:

npx jest

Cypress

Install Cypress:

npm install --save-dev cypress

A simple Cypress test (cypress/integration/app_spec.js) might look like this:

describe('Homepage', () => {
  it('displays hello world', () => {
    cy.visit('/');
    cy.contains('h1', 'Hello, World!');
  });
});

To run your Cypress tests:

npx cypress open

Angular

For Angular, instead of Jest and Cypress, you'll use Jasmine and Cypress (or Nightwatch, WebdriverIO).

A simple Jasmine test (src/app/app.component.spec.ts) could look like:

it('should display hello world', () => {
  const fixture = TestBed.createComponent(AppComponent);
  fixture.detectChanges();
  const compiled = fixture.nativeElement;
  expect(compiled.querySelector('h1').textContent).toContain('Hello, World!');
});

To run your Jasmine and Cypress tests:

ng test
ng e2e

Deploying Your Project

Depending on the framework and the complexity of your project, there are numerous ways to deploy your application. For simpler applications, Vercel, Netlify, and GitHub Pages are popular choices.

Please follow the respective deployment guide for your chosen framework:

• Next.js Deployment Documentation
• Remix Deployment Documentation
• Gatsby Deployment Documentation
• Angular Deployment Documentation
• Vue.js Deployment Guide

Remember to commit and push your changes to a remote repository before deploying your application.