Chapter 10: Building a Project from Scratch
Tags: javascript, react, angular, vue
Published: 2023-05-30 12:58:30

## 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:


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

### Remix

Start a new Remix project:


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

### Gatsby

Start a new Gatsby site:


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

### Angular

Start a new Angular application:


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

### Vue.js

Start a new Vue.js project:


```bash
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`:


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

export default HomePage;
```

### Remix

In `app/routes/_index.jsx`:

```javascript
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`:


```javascript
import React from "react"

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

export default IndexPage
```

### Angular

In `src/app/app.component.ts`:


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

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

### Vue.js

In `src/App.vue`:


```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:


```bash
npm install --save-dev jest
```

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


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

To run your Jest tests:


```bash
npx jest
```

### Cypress

Install Cypress:


```bash
npm install --save-dev cypress
```

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


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

To run your Cypress tests:


```bash
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:


```typescript
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:


```bash
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](https://nextjs.org/docs/deployment)
-   [Remix Deployment Documentation](https://remix.run/docs/en/v1/guides/deployment)
-   [Gatsby Deployment Documentation](https://www.gatsbyjs.com/docs/deploying-and-hosting/)
-   [Angular Deployment Documentation](https://angular.io/guide/deployment)
-   [Vue.js Deployment Guide](https://cli.vuejs.org/guide/deployment.html)

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