Matt

Create a blog with Netlify CMS and Gatsby

If you love the speed and developer experience of the Jamstack, this guide’s for you. We’ll combine the intuitive content editing of Netlify CMS with the React-powered framework, Gatsby, to build a blazing-fast blog. If you’re interested in learning more about Netlify’s CMS, click here for our deep dive.

Prerequisites

  • Basic familiarity with JavaScript, React, and Git
  • A Node.js installation (https://nodejs.org/)
  • A GitHub account
  • A Netlify account

Part 1: Project Setup

  1. Install Gatsby CLI:
  2. Bash
  3. npm install -g gatsby-cli
  4. Use code with caution.
  5. content_copy
  6. Create a Gatsby Project:
  7. Bash
  8. gatsby new my-awesome-blog
  9. cd my-awesome-blog

 

  1. Install Netlify CMS Dependencies:
  2. Bash
  3. npm install netlify-cms-app gatsby-plugin-netlify-cms

Part 2: Netlify CMS Configuration

  1. Create a Configuration File (config.yml)
  2. Create a file named static/admin/config.yml. Here’s a basic example:
  3. YAML
  4. backend:
  5.   name: git-gateway
  6.   branch: main 
  7. media_folder: static/img
  8. public_folder: /img
  9. collections: 
  10.   – name: “blog” 
  11.     label: “Blog Posts” 
  12.     folder: “src/posts” 
  13.     create: true  
  14.     slug: “{{year}}-{{month}}-{{day}}-{{slug}}” 
  15.     fields: 
  16.       – { label: “Title”, name: “title”, widget: “string” } 
  17.       – { label: “Publish Date”, name: “date”, widget: “datetime” } 
  18.       – { label: “Body”, name: “body”, widget: “markdown” } 

 

  1. Important Notes:
    • Customize carefully: Adjust the media_folder, public_folder, collections, and fields to match your desired blog structure.
    • More field types: Netlify CMS supports images, lists, and more: (https://www.netlifycms.org/docs/widgets/)
  1. Update gatsby-config.js:
  2. JavaScript
  3. module.exports = {
  4.   // … existing config
  5.   plugins: [
  6.     // … other plugins,
  7.     ‘gatsby-plugin-netlify-cms’
  8.   ]
  9. }

Part 3: Creating Blog Post Templates

  1. Create a Template: Create a file like src/templates/blog-post.js:
  2. JavaScript
  3. import React from ‘react’
  4. import { graphql } from ‘gatsby’
  5. const BlogPost = ({ data }) => {
  6.   const post = data.markdownRemark
  7.   return (
  8.     <div>
  9.       <h1>{post.frontmatter.title}</h1>
  10.       <div dangerouslySetInnerHTML={{ __html: post.html }} />
  11.     </div>
  12.   )
  13. }
  14. export const query = graphql`
  15.   query($slug: String!) {
  16.     markdownRemark(fields: { slug: { eq: $slug } }) {
  17.       html
  18.       frontmatter {
  19.         title
  20.         date
  21.       }
  22.     }
  23.   }
  24. `

Part 4: Git and Netlify Integration

  1. Initialize Git and Push to GitHub:
  2. Bash
  3. git init
  4. git add .
  5. git commit -m “Initial commit”
  6. # Follow instructions to create a new GitHub repo and push

 

  1. Deploy to Netlify:
    • Connect your GitHub repo to Netlify.
    • Set the build command to gatsby build

Part 5: Accessing the CMS and Writing

  1. Access the CMS: Your CMS will be at https://your-site-url.netlify.app/admin/
  2. Authenticate: Log in with your GitHub credentials.
  3. Start Blogging: Click “New Blog Posts” and get writing!

 

JavaScript DOM Methods and Properties

Have you ever wondered how web pages go from static blocks of text to the interactive experiences we use every day? Think about buttons that change things, menus that appear when you hover over them, or forms that magically validate your input. The secret lies in the Document Object Model (DOM) and JavaScript’s ability to manipulate it.

The DOM Made Simple

Imagine your HTML page as a family tree. Each HTML tag is like a member of that family. At the top, you have the <html> element as the grandparent, then elements like <head> and <body> as its children, and so on. The DOM is this tree-like representation that JavaScript can interact with.

Why It Matters

Understanding the DOM is the foundation for adding any kind of dynamic behavior to your web pages. Without it, websites would be pretty boring!

DOM Properties – Your Access Points

Think of DOM properties as the way you describe different elements in that HTML family tree.

  • Key Node Properties
    • nodeType: Tells you if you’re dealing with an element, text, or something else.
    • nodeName: The tag name of an element (like “DIV,” “P,” “IMG”).
    • nodeValue: The actual text content within a text node.
  • Document Properties
    • document.body: Represents the entire <body> section of your page.
    • document.title: Contains the text within the <title> tag.

Example: Changing the Page Title

JavaScript

document.title = “My New Awesome Title!”; 

DOM Methods – Your Power Tools

If properties are for describing elements, methods are the actions you can take on them.

  • The Art of Selection
    • getElementById(‘my-button’): Grabs a single element with the specified ID.
    • getElementsByTagName(‘p’): Returns a collection of all paragraph elements.
    • querySelectorAll(‘.special-image’): The most flexible, uses CSS-like selectors.
  • Transformation
    • createElement(): Lets you build new HTML elements from scratch.
    • appendChild(): Adds a new element as a child of another.
    • removeChild(): Removes an element from the page.
  • Style and Content
    • element.textContent: Gets or sets the plain text inside an element.
    • element.innerHTML: Gets or sets the full HTML content within an element.
    • element.style.color = ‘blue’: Changes CSS styles directly.

It’s Alive! Events and the DOM

The DOM lets you react to user actions:

  • Brief Intro to Events: Clicks, hovers, form submissions—these are all events.
  • Example: A Revealing Button

JavaScript

const button = document.getElementById(‘secret-button’);

button.addEventListener(‘click’, function() {

  const hiddenMessage = document.getElementById(‘secret-message’);

  hiddenMessage.style.display = ‘block’; 

});

Leveling Up

  • There’s Always More: This is a foundational guide – explore resources like MDN Web Docs to dive deeper.
  • Frameworks and Libraries: React, Vue.js, and others streamline DOM manipulation for large projects.

Conclusion

Now that you have a grasp of the DOM, you’re ready to start making your websites interactive. Start small, experiment, and have fun!

React Router Navigation and Redirects

Building dynamic React applications often necessitates controlling how users move between different sections of your website. React Router is a powerful library that simplifies routing, but it also provides tools for programmatic navigation (using the navigate function) and automatic redirects (using <Navigate> and related techniques). In this post, we’ll explore both concepts and see how they work in practice, especially with the latest version of React Router (v6).

React Router Navigation

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“react router navigate”

The navigate function in React Router lets you change the current URL and trigger a navigation within your React app, even from outside of your React components.

Core Usage:

JavaScript

import { useNavigate } from ‘react-router-dom’;

function MyComponent() {

  const navigate = useNavigate();

  const handleButtonClick = () => {

    navigate(‘/profile’); // Navigates to the ‘/profile’ route

  };

  return (

    <button onClick={handleButtonClick}>Go to Profile</button>

  );

}

Common Use Cases:

  • Form Submissions: Redirect to a success page after form submission.
  • Data Fetching: Navigate to a content page after data is loaded.
  • Event Handling: Navigate in response to any button clicks or user interactions.

Options

  • replace: true: Replace the current history entry instead of pushing a new one (useful to prevent the back button from returning to the previous form page).

“react router redirect”

Redirects automatically send users to a different route based on conditions you define.

React Router v5 (Older)

Prior to v6, the <Redirect> component was the standard:

JavaScript

import { Redirect } from ‘react-router-dom’; 

<Route path=”/old-page”>

  <Redirect to=”/new-page” />

</Route>

React Router v6 (Current)

  • <Navigate> Component: Used within JSX for in-component redirects.
  • JavaScript
  • import { Navigate } from ‘react-router-dom’;
  • function HomePage() {
  •   const isLoggedIn = false; 
  •   if (!isLoggedIn) {
  •     return <Navigate to=”/login” replace />; 
  •   }
  •   // … Rest of home page content
  • }
  • useNavigate Hook: For redirects outside of components or more complex logic handling

Conditional Redirects

Route protection based on authentication is a common redirect use case.

Taking Your Navigation Skills to the Next Level: Advanced React Router Techniques

While the basic navigation and redirect patterns cover many common scenarios, React Router’s capabilities extend much further. Let’s explore some advanced techniques and best practices to elevate your navigation game.

Elaborated Use Cases: Real-World Examples

  1. Form Submissions with Feedback:

JavaScript

import { useNavigate } from ‘react-router-dom’;

import { useState } from ‘react’;

 

function OrderForm() {

  const navigate = useNavigate();

  const [submissionStatus, setSubmissionStatus] = useState(null);

 

  const handleSubmit = async (formData) => {

    try {

      // Send form data (e.g., to API)

      await fetch(‘/api/orders’, { 

        method: ‘POST’, 

        body: JSON.stringify(formData) 

      });

      

      // Successful submission

      setSubmissionStatus(‘success’); 

      navigate(‘/order-success’, { state: { formData } });

    } catch (error) {

      // Error handling

      setSubmissionStatus(‘error’);

    }

  };

 

  //  form UI, including conditional rendering based on submissionStatus

}

 

In this example, we add error handling and use the submissionStatus state to provide visual feedback to the user before redirection.

  1. Data Fetching with Loading States:

JavaScript

import { useNavigate, useParams } from ‘react-router-dom’;

import { useEffect, useState } from ‘react’;

 

function ProductPage() {

  const { productId } = useParams();

  const navigate = useNavigate();

  const [product, setProduct] = useState(null);

  const [isLoading, setIsLoading] = useState(true);

 

  useEffect(() => {

    async function fetchData() {

      const response = await fetch(`/api/products/${productId}`);

      const data = await response.json();

      setProduct(data);

      setIsLoading(false);

    }

 

    fetchData();

  }, [productId]); 

 

  if (isLoading) {

    return <div>Loading…</div>;

  }

 

  if (!product) {

    return <Navigate to=”/not-found” />;

  }

 

  //  render product details

}

Here, we fetch product data based on the route parameter (productId). While loading, we display a “Loading…” message; if no product is found, we redirect to a “Not Found” page.

Advanced Redirect Scenarios and Troubleshooting

  • Role-Based Redirects: Use conditional logic within your components or route definitions to redirect users based on their authentication status or roles.
  • Delayed Redirects: Leverage setTimeout within a useEffect hook to trigger a redirect after a specified delay (e.g., for splash screens).
  • Query Parameter Preservation: Utilize the useLocation hook to access and preserve query parameters during redirects.
  • Infinite Redirects: Carefully examine your redirect conditions to ensure they don’t create endless loops.
  • Redirect Flash: Consider using a loading state or a transition animation to prevent a brief flash of the redirected page.

By mastering these advanced techniques, you’ll be able to create more sophisticated and user-friendly navigation experiences in your React applications. Let me know if you’d like more in-depth examples or guidance on any specific navigation challenge you’re facing!

How to Save Data with Local Storage in React

Getting Started with Local Storage in React

While React doesn’t have a dedicated hook for Local Storage, interacting with it is surprisingly straightforward. Let’s start with the essential methods:

JavaScript

// Saving Data

localStorage.setItem(‘key’, ‘value’); // Stores a string

// Retrieving Data

const value = localStorage.getItem(‘key’);

// Removing Data

localStorage.removeItem(‘key’);

Important Considerations:

  • Strings Only: Local Storage only accepts strings. If you need to store objects or arrays, convert them to JSON strings using JSON.stringify() before storing and JSON.parse() after retrieving.
  • Storage Limits: Local Storage has a finite capacity, typically around 5MB per domain. Avoid storing excessive amounts of data.
  • Browser Compatibility: Fortunately, Local Storage enjoys widespread support in modern browsers.




How to Save Data with Local Storage in React

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The core of persisting data in your React applications lies in mastering the localStorage.setItem() method. It’s your gateway to storing information that survives page refreshes and browser restarts.

The Essential Steps:

  1. Choose Your Key: Every piece of data in Local Storage is associated with a unique key (a string). This key acts like a label, allowing you to retrieve your data later.
  2. Prepare Your Data: Local Storage only accepts strings. If you’re dealing with objects or arrays, convert them to JSON format using JSON.stringify().
  3. Save to Local Storage: Use localStorage.setItem(key, value) to store your data. Remember to pass your chosen key and the stringified value.

Example: Saving User Preferences

JavaScript

const userPreferences = {

  theme: ‘dark‘,

  language: ‘en‘,

};

 

localStorage.setItem(‘userPreferences’, JSON.stringify(userPreferences));

 

React-Specific Tips:

  • useEffect Hook: In React, the useEffect hook is ideal for saving data to Local Storage. This hook allows you to trigger an action (like saving data) whenever a component’s state or props change.
  • State Management: In the context of React components, you’ll typically store your data in state variables. When these state variables update, you can use useEffect to synchronize them with Local Storage.

A Word of Caution:

  • Storage Limits: Local Storage has a finite capacity, usually around 5MB. Be mindful of this limit, especially if you’re dealing with larger datasets.
  • Security: Never store sensitive data (passwords, personal information) in Local Storage as it’s not inherently secure.

Building a Note-Taking App with Persistent Storage

Let’s bring Local Storage to life by building a simple yet functional note-taking app in React. We’ll utilize functional components and hooks to keep things clean and concise.

JavaScript

import React, { useState, useEffect } from ‘react’;

 

function App() {

  const [notes, setNotes] = useState([]);

 

  useEffect(() => {

    const storedNotes = JSON.parse(localStorage.getItem(‘notes’));

    if (storedNotes) {

      setNotes(storedNotes);

    }

  }, []); // Run only once on initial render

 

  useEffect(() => {

    localStorage.setItem(‘notes’, JSON.stringify(notes));

  }, [notes]); // Run whenever the ‘notes’ state changes

 

  // (Your code for adding, deleting, and displaying notes)

}

 

Let’s break down this example:

  1. We use the useState hook to manage our notes data.
  2. The first useEffect hook loads notes from Local Storage when the component first mounts.
  3. The second useEffect hook automatically saves notes back to Local Storage whenever the notes state changes.

Why Choose Local Storage?

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Local Storage is like a small, persistent data vault built into your browser. Unlike session storage, which gets wiped clean when you close the tab or window, Local Storage lets you save key-value pairs that remain available even after you shut down your browser.

So, when should you reach for Local Storage? Here are a few ideal scenarios:

  • Preserving User Preferences: Remember your user’s preferred theme (dark mode, anyone?), language settings, or other UI customizations.
  • Managing Application State: Keep track of items in a shopping cart, progress in a game, or the current step in a multi-part form.
  • Caching Data: Store temporary copies of API responses to speed up loading times and reduce server requests.

Beyond the Basics: Advanced Local Storage Techniques

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Ready to level up your Local Storage game? Here’s what you can explore:

  • Error Handling: Learn how to gracefully handle situations like exceeding the storage quota.
  • Advanced Use Cases: Discover how to leverage Local Storage for caching, offline capabilities, and complex user settings management.
  • Security Best Practices: Protect your data by avoiding storing sensitive information and mitigating cross-site scripting (XSS) vulnerabilities.

Elevate Your Note-Taking App

Enhance your note-taking app with these additional features:

  • Editing Notes: Empower users to modify their existing notes.
  • Search and Filter: Implement search functionality and filters to make finding specific notes a breeze.
  • Timestamps: Add creation and modification dates to keep track of note history.




How to Handle Inputs and Forms in React

Forms are the gateways to user interaction on the web. Whether it’s a simple contact form, a complex survey, or a login page, React forms are how you gather valuable information from your users. React’s approach to form management might seem a little different at first, but it offers exceptional control and flexibility. This guide will walk you through building robust, user-friendly forms in your React applications.

Prerequisites:

  • Basic understanding of React components and state management.
  • Familiarity with HTML form elements (<form><input><textarea>, etc.)

Controlled Components: The Heart of React Forms

In React, we use the concept of “controlled components” to manage form data. A controlled component is a form element whose value is directly managed by React’s state. Here’s how it works:

  1. State Connection: We store the form data within our component’s state.
  2. Input Value Binding: The input fields’ value attribute is linked to the corresponding state variable.
  3. Change Handlers: onChange event handlers update the state whenever the user changes input values.

Example: Creating a Simple Contact Form

JavaScript
import React, { useState } from 'react';

function ContactForm() {
  const [name, setName] = useState('');
  const [email, setEmail] = useState('');

  const handleSubmit = (event) => {
    event.preventDefault(); // Prevent page reload
    console.log('Form data:', { name, email }); // Do something with form data
  };

  return (
    <form onSubmit={handleSubmit}>
      <label htmlFor="name">Name:</label>
      <input type="text" id="name" value={name} onChange={(e) => setName(e.target.value)} />

      <label htmlFor="email">Email:</label>
      <input type="email" id="email"  value={email} onChange={(e) => setEmail(e.target.value)} />

      <button type="submit">Submit</button>
    </form>
  );
}

export default ContactForm;

Explanation:

  • We use useState to manage the name and email state values.
  • Input fields are bound to their state values and updated using onChange handlers.
  • onSubmit handles form submission; you’d typically send the form data to a server here.

Form Validation

Ensuring that users enter valid data is crucial. Here’s how to add client-side validation to our form:

JavaScript
  // ... other code ...

  const [errors, setErrors] = useState({}); // State to store validation errors

  const validateForm = () => {
    const newErrors = {};
    if (!name) { newErrors.name = 'Name is required'; }
    // ... Add more validations ...
    setErrors(newErrors);
  };

  const handleSubmit = (event) => {
    // ... (existing code) ...
    validateForm(); 
    if (Object.keys(errors).length === 0) {
       // Submit the form if no errors
    }  
  };

  // ... (rest of the code) ...

Display error messages inline with respective form fields.

Beyond the Basics

  • Handling Multi-Step Forms: Strategies for breaking down complex forms.
  • Dynamic Forms: Techniques for adding/removing fields based on user actions.
  • Third-Party Libraries: Discuss Formik, React Hook Form for advanced scenarios.

Conclusion

Forms are a cornerstone of web development, and React offers a powerful way to build and manage them. I hope this guide has equipped you to create robust, user-friendly forms in your React projects!

How to Set up a Gatsby JS Project

Understanding Gatsby.js: Why Use It?

  • Static Site Generator: Gatsby transforms your React code into a static HTML, CSS, and JavaScript file collection.
  • Performance: Static sites generated by Gatsby deliver lightning-fast load speeds and enhanced user experiences.
  • SEO-Friendly: Pre-rendered HTML makes your content easily discoverable by search engines.
  • Ideal for Blogs: Gatsby’s strengths and the included ‘blog starter’ make it a popular choice for building blogs and similar content-driven websites.

Prerequisites

  • Node.js (version 18 or newer): Download and install from https://nodejs.org/
  • npm or yarn (package managers): These are installed along with Node.js.

Installation

  1. Global Gatsby CLI:
  2. Bash
  3. npm install -g gatsby-cli
  4. Use code with caution.
  5. content_copy
  6. Or, if you prefer yarn:
  7. Bash
  8. yarn global add gatsby-cli
  9. Use code with caution.
  10. content_copy

Creating Your Gatsby Project

  1. Using the Default Starter:
  2. Bash
  3. gatsby new my-awesome-project
  4. Use code with caution.
  5. content_copy
  6. Using the Blog Starter:
  7. Bash
  8. gatsby new my-blog https://www.gatsbyjs.org/starters/gatsbyjs/gatsby-starter-blog/
  9. Use code with caution.
  10. content_copy

Project Structure

  • content/blog: Houses your blog posts in Markdown format.
  • src: Contains React components, pages, templates, and utility functions.
    • components: Reusable React components.
    • pages: Components here become individual pages on your site.
    • templates: Reusable layouts for pages (like blog post templates).
  • gatsby-config.js: Site metadata, plugin configuration.
  • gatsby-node.js: Dynamic page creation, GraphQL node customization.
  • gatsby-browser.js: Client-side JavaScript for browser customization.

Running the Development Server

  1. Navigate into your project directory:
  2. Bash
  3. cd my-blog 
  4. Use code with caution.
  5. content_copy
  6. Start the development server:
  7. Bash
  8. gatsby develop
  9. Use code with caution.
  10. content_copy
  11. Your site will be accessible at http://localhost:8000

Key Concepts and Customization

  • GraphQL: Gatsby uses GraphQL to fetch data from various sources (e.g., Markdown files, CMSs).
  • Plugins: Extend Gatsby’s functionality with plugins for image optimization, data sourcing, SEO, and more. Find them on the Gatsby Plugin Library: https://www.gatsbyjs.com/plugins/
  • Styling: Gatsby supports various styling methods (CSS Modules, styled-components, etc.).

Wrapping Up

Gatsby offers a powerful, streamlined approach to building blazing-fast, SEO-optimized React websites. Its pre-rendering, rich plugin ecosystem and starter templates make it an excellent choice for developers seeking a performant and developer-friendly solution.

How to Set up React in a HTML File

Most React projects rely on complex build tools. But did you know you can set up simple React components directly within an HTML file? This approach is ideal for rapid prototyping or adding interactive elements to existing pages.

Step 1: Include the Libraries

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Add the following CDN scripts inside the <head> of your HTML file:

HTML
<script crossorigin src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
<script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
  • Quick Explanation: (Provide a sentence or two about what each library does – React, ReactDOM, Babel.)

Step 2: Prepare Your HTML

Create a div to hold your React app:

HTML
<body>
  <div id="root"></div>
</body>

Step 3: Write React Code (with Babel)

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Embed this inside <script type="text/babel"> tags:

JavaScript
class App extends React.Component {
  render() {
    return (
      <div>
        <h1>React Setup</h1>
      </div>
    );
  }
}

ReactDOM.render(<App />, document.getElementById('root'));

Step 4: Production Mode

  • Important: Replace the development CDN links with production-ready versions.

How to Build a Simple React Stopwatch Timer

Project Setup

  1. Prerequisites: Ensure you have Node.js and npm (or yarn) installed on your system.

  2. Create React App:

    Bash
    npx create-react-app my-stopwatch-app
    cd my-stopwatch-app
    

Component Structure

  1. Create a Component: Inside your src folder, create a file named Stopwatch.jsx. This will contain the logic and structure of your stopwatch.

Basic Stopwatch Implementation

JavaScript
import React, { useState, useEffect, useRef } from 'react';

function Stopwatch() {
  const [timer, setTimer] = useState(0);
  const [isRunning, setIsRunning] = useState(false);
  const intervalRef = useRef(null);

  useEffect(() => {
    if (isRunning) {
      intervalRef.current = setInterval(() => {
        setTimer((prevTimer) => prevTimer + 10);
      }, 10);
    } else if (!isRunning) {
      clearInterval(intervalRef.current);
    }

    return () => clearInterval(intervalRef.current);
  }, [isRunning]);

  const startTimer = () => {
    setIsRunning(true);
  };

  const stopTimer = () => {
    setIsRunning(false);
  };

  const resetTimer = () => {
    setTimer(0);
  };

  const formatTime = (timer) => {
    const getSeconds = `0${(timer / 1000) % 60}`.slice(-2);
    const minutes = `${Math.floor(timer / 60000)}`.padStart(2, '0');
    const milliseconds = `0${(timer % 1000)}`.slice(-3);

    return `${minutes} : ${getSeconds} : ${milliseconds}`;
  };

  return (
    <div className="stopwatch">
      <h2>Stopwatch</h2>
      <div className="stopwatch-display">
        {formatTime(timer)}
      </div>
      <div className="stopwatch-buttons">
        <button onClick={startTimer}>Start</button>
        <button onClick={stopTimer}>Stop</button>
        <button onClick={resetTimer}>Reset</button>
      </div>
    </div>
  );
}

export default Stopwatch;

Explanation

  • State:
    • timer: Stores the elapsed time in milliseconds.
    • isRunning: Indicates if the stopwatch is running.
  • useRef:
    • intervalRef stores the interval ID, allowing us to clear the interval when needed.
  • useEffect:
    • Manages the interval for updating the timer when isRunning changes.
    • The cleanup function clears the interval when the component unmounts or isRunning becomes false.
  • Functions:
    • startTimer: Sets isRunning to true to start the timer.
    • stopTimer: Sets isRunning to false to stop the timer.
    • resetTimer: Resets the timer state to 0.
  • formatTime: Helper function to format the time display.

Rendering the Stopwatch

In your main App.js file:

JavaScript
import React from 'react';
import Stopwatch from './Stopwatch';

function App() {
  return (
    <div className="App">
      <Stopwatch />
    </div>
  );
}

export default App;

Styling

Add some CSS in a Stopwatch.css file (and import it into your Stopwatch.jsx):

CSS
/* Stopwatch.css */
.stopwatch { /* ... */ }
.stopwatch-display { /* ... */ }
.stopwatch-buttons { /* ... */ }

Start the App:

Bash
npm start

How to deploy mern app to heroku

Heroku is a powerful cloud platform that makes deploying and managing web applications remarkably easy. Its seamless support for Node.js, along with its free tier for basic apps, makes Heroku a popular choice for deploying MERN stack applications. In this guide, we’ll walk you through the steps of deploying your MERN app to Heroku.

Prerequisites

Before you begin, ensure you have the following:

Steps for Deployment

1. Prepare Your Backend for Deployment

  • Production Build (React):  In your React project’s directory (usually client), create an optimized production build using:
  • Bash
  • npm run build 
  • Use code with caution.
  • content_copy
  • Server Configuration: Verify that your Express server is set up to serve the static files created by your React build. Here’s a common way to do this:
  • JavaScript
  • // In your server’s index.js or main server file
  • const path = require(‘path’); 
  • app.use(express.static(path.join(__dirname, ‘client’, ‘build’)));
  • // … other server code
  • Start Script: Add a “start” script in your backend’s package.json to tell Heroku how to launch your server (e.g., “start”: “node index.js”)

2. Create a Heroku App

  • Login: Open a terminal and log in to your Heroku account:
  • Bash
  • heroku login
  • Create App:  Give your app a unique name:
  • Bash
  • heroku create <your-unique-app-name>

3. Database Setup (If Needed)

  • MongoDB: If your app uses MongoDB, add a database instance. Heroku offers add-ons like MongoDB Atlas (which usually has a free tier). Follow the instructions for the chosen add-on to provision your database.
  • Environment Variables: Set your MongoDB connection string in Heroku’s app settings under “Config Vars.”

4. Git Deployment

  • Initialize Git (if needed):  Use git init within your project’s root directory.
  • Add Heroku Remote:
  • Bash
  • heroku git:remote -a <your-unique-app-name>
  • Push Code:
  • Bash
  • git add .
  • git commit -m “Ready for Heroku deployment”
  • git push heroku master 

Testing and Troubleshooting

  • Open Your App:  Visit https://your-unique-app-name.herokuapp.com to see your deployed MERN application.
  • Check Logs: Use the Heroku CLI command heroku logs to debug any issues during the deployment process.

Heroku vs AWS Elastic Beanstalk

You’ve worked tirelessly to build an amazing web application. Suddenly, it goes viral. Your traffic surges, and your traditional web hosting setup creaks under the strain. Servers crash, the user experience suffers, and you scramble to find a solution. This is where the flexibility and scalability of cloud hosting shine.

Cloud hosting offers a powerful alternative to traditional hosting models. Instead of relying on single, physical servers, it uses a network of virtual servers spread across the globe.

This allows for:

  • Pay-as-you-go Cost Models: Only pay for the resources you actually use.
  • Rapid Scalability: Instantly scale up (or down!) to meet demand.
  • Improved Security: Benefit from the expertise of large cloud providers.At a Glance Heroku vs. AWS

Heroku vs AWS Table Breakdown

In this table, we’ll breakdown Heroku vs AWS and talk about the different feature categories and how the two services measure up.

Feature Category Heroku AWS Elastic Beanstalk
Deployment & Management Heroku offers an app-centric and developer-friendly approach, supporting direct deployment from Git, GitHub, and CI systems. It provides an intuitive dashboard for app management.​​ Elastic Beanstalk automatically handles the deployment, from capacity provisioning, load balancing, and auto-scaling to application health monitoring.
Supported Languages Supports Node.js, Ruby, Java, PHP, Python, Go, Scala, Clojure, and more through official and third-party buildpacks.​​ Supports Java, .NET, PHP, Node.js, Python, Ruby, Go, and Docker, allowing for a wide range of applications.
Runtime Environment Uses smart containers called dynos for a managed runtime environment, ensuring that the system and language stacks are always up-to-date.​​ Provides a managed platform with automated scaling and integration with AWS services for a secure and scalable environment.
Data Services Offers fully-managed data services like Heroku Postgres, Redis, and Apache Kafka.​​ Integrates with Amazon RDS for relational databases and Amazon DynamoDB for NoSQL. Also supports other AWS data services for comprehensive data management solutions.
Add-ons & Extensions Features a rich ecosystem with over 200 add-ons for extending app functionalities.​​ Supports various AWS services and third-party tools via the AWS Marketplace, offering extensive customization and extension capabilities.
Scalability Instant vertical and horizontal scaling with easy management through the Heroku Dashboard.​​ Elastic Beanstalk automatically scales applications up and down based on defined conditions, handling high availability across multiple geographic regions.
Collaboration & Control Offers secure collaborative environments and fine-grained access controls for team innovation and accountability.​ Provides IAM (Identity and Access Management) for secure access control. Elastic Beanstalk environments can be managed by teams with specific IAM roles and policies.
Enterprise Features Heroku Enterprise adds features for larger organizations, including private spaces, Heroku Connect for Salesforce integration, enterprise-grade support, and more.​​ AWS offers additional services for enterprises, such as AWS Direct Connect and AWS Identity and Access Management, along with AWS support plans for operational and billing inquiries.
Continuous Delivery & CI/CD Supports Heroku Flow, Review Apps, and GitHub Integration for continuous delivery and efficient, visual shipping of applications.​​ Elastic Beanstalk integrates with AWS CodePipeline to enable continuous delivery and supports various CI/CD tools for automation.
Security & Compliance Ensures security with automatic OS patching, threat monitoring, and compliance standards (PCI, HIPAA, ISO, SOC). Offers Heroku Shield for additional security needs.​​ Provides compliance with multiple standards and offers services like AWS Shield for DDoS protection and AWS WAF for web application security.

Heroku Pricing vs AWS Pricing

While many cloud providers exist, two names dominate the space: Amazon Web Services (AWS) and Heroku. Let’s break down their key strengths and tradeoffs to see which would better suit your needs:

  • Cost Models:
    • AWS: Typically offers a pay-as-you-go structure, giving granular control, but can be complex to calculate.
    • Heroku: Often a simpler pricing model, but potentially less flexibility for very specific resource needs.
Feature Heroku AWS Elastic Beanstalk
Pricing Model Dyno-based pricing with various types including Eco, Basic, Standard, and Performance. Prices are prorated to the second. AWS uses a pay-as-you-go pricing model for its services.
Eco Dyno $5 for 1,000 dyno hours per month, shared across all Eco dynos. N/A
Basic Dyno ~$0.01/hour, max $7/month. N/A
Standard-1X ~$0.03/hour, max $25/month. N/A
Standard-2X ~$0.06/hour, max $50/month. N/A
Performance-M ~$0.34/hour, max $250/month. N/A
Performance-L ~$0.69/hour, max $500/month. N/A
Data Add-Ons Data services like Heroku Postgres start at $5/month for a Mini plan, with costs prorated to the second based on usage. Variable based on the AWS service used (e.g., RDS, DynamoDB)
Billing Billing is based on usage, with all costs prorated to the second. The bill is for the previous month of use. Pay for what you use in the previous month.

Scalability:

  • AWS: Immense scalability options, but requires a deeper understanding of underlying infrastructure to adjust efficiently.
  • Heroku: Easy scaling to a certain point, but may need architectural changes for large-scale applications.
  • Security:
    • AWS: Shared responsibility model (you manage some aspects, AWS handles others). Offers granular security controls.
    • Heroku: A focus on ‘secure by default’ may mean less configuration control is needed, but it may also mean less flexibility in some cases.




Demystifying Major Cloud Providers: AWS vs. Heroku

Let’s take a closer look at the core tools and services offered by each platform, helping you understand what they offer under the hood:

Amazon Web Services (AWS)

  • EC2 (Elastic Compute Cloud): The backbone of AWS. EC2 provides virtual servers on-demand, giving you full control over operating systems, software, and configurations.
    • Use case: Running web applications, databases, or specialized software.
  • S3 (Simple Storage Service): Highly scalable object storage. Perfect for images, videos, backups, and static website hosting.
    • Use Case: Storing and delivering large amounts of media.
  • Elastic Beanstalk: The AWS equivalent to Heroku’s ease of deployment. Upload your code, and Elastic Beanstalk handles provisioning servers, load balancing, etc.
    • Pros: Simplifies deployment for developers who don’t want to manage infrastructure directly.
    • Cons: Offers less control compared to EC2 and can be less cost-effective for high-traffic applications.

Heroku

  • Heroku Platform: Heroku’s core strength lies in streamlining the development and deployment process. It automatically provisions servers, sets up load balancing, and manages scaling.
    • Use case: Quick launch for web applications without extensive infrastructure knowledge.
  • Dynos: Heroku’s unit of measurement for scaling resources. You can easily add more dynos to boost your application’s processing power
    • Pros: Simplified resource allocation.
    • Cons: Can become expensive for compute-intensive applications.
  • Heroku Add-ons: A marketplace of pre-configured services (databases, monitoring tools, etc.) to augment your app
    • Use case: Expanding functionality without time-consuming setup.

Heroku vs AWS: Beyond the Basics

The core difference between Heroku and AWS boils down to control vs. convenience. AWS offers a vast array of services and granular configuration options. This makes it ideal for organizations needing maximum flexibility but involves a steeper learning curve. Heroku, on the other hand, prioritizes developer experience and ease of use, allowing you to launch applications quickly with minimal infrastructure worries. We have a simplified blog post on the topic here.

Decision Factors to Consider

  • Technical Expertise: Do you have a team well-versed in cloud architecture, or do you prioritize a developer-friendly experience?
  • Growth Potential: Does your application need to scale massively in the future? AWS offers more scalability headroom but requires careful planning.
  • Cost/Time Sensitivity: Heroku’s convenience often means a slightly higher cost for comparable resources. Is rapid deployment worth the premium?
  • Feature & Control Needs: Does your application demand very specific services or configuration options only available on AWS?

Expanding Your Cloud Horizons

While AWS and Heroku are popular, it’s valuable to be aware of the broader cloud landscape:

  • Multi-Cloud Strategies: Combining strengths from multiple providers (e.g., using AWS for core infrastructure but Heroku for rapid prototyping).
  • Hybrid Cloud Options: Blending traditional on-premises servers with cloud resources for maximum flexibility and compliance.
  • Other Major Players: Microsoft Azure and Google Cloud Platform offer robust alternatives worth exploring.

Making the Right Cloud Choice: Startups & SMBs

For startups and smaller businesses, the cloud choice often centers around ease of deployment, rapid iteration, and cost management. Let’s see how Heroku and AWS stack up in these crucial areas:

Startups: When Time to Market is King

  • Heroku’s Advantage: Its “push code and it works” approach significantly shortens the development cycle. Ideal when speed to market is paramount.
  • Elastic Beanstalk: A strong alternative if you prefer the power of AWS but want simpler deployment.
  • Keep in Mind: Heroku’s ease of use might lead to higher costs as your application scales. Regular cost optimization is key.

Growing Pains & Scaling

  • AWS for Scaling: Provides virtually limitless capacity but requires more upfront configuration and ongoing management.
  • Heroku Limitations: Scaling beyond a certain point may require architectural adjustments, making it less than ideal for apps that expect massive growth.
  • Hybrid Approach: Consider using Heroku for development and rapid prototyping, then migrating components to AWS for cost-efficiency at scale.

Budget Considerations:

  • Heroku: Predictable pricing but potentially more expensive in the long run for high-traffic applications.
  • AWS: Pay-as-you-go can be highly cost-effective if you optimize resource usage and take advantage of reserved instances (a commitment for lower rates).

Expanding Your Cloud Horizons

While Heroku and AWS are industry leaders, it’s wise to consider the bigger picture of the cloud computing landscape. Here are a few concepts worth exploring:

  • Multi-Cloud Strategies:   Businesses increasingly use multiple cloud providers simultaneously. This could mean using AWS for core infrastructure, Heroku for rapid prototyping, or leveraging best-in-class services from different vendors.
  • Hybrid Cloud Options:  For specific needs, combining traditional on-premises servers with cloud resources provides maximum flexibility. Certain security-sensitive data might reside on your own hardware, while public-facing applications benefit from cloud scalability.
  • Other Major Players: Microsoft Azure and Google Cloud Platform offer compelling alternatives. Investigating their strengths could lead to better cost optimization or solutions tailored to your specific industry.

Key point: Don’t feel locked into a single provider. As your business evolves, so too might your cloud strategy.

Making the Right Cloud Choice: Enterprises & Large Businesses

For enterprises, the cloud decision is driven by long-term scalability, comprehensive security, and flexibility to support complex workloads. Here’s what to consider:

Security & Compliance

  • AWS Advantage: Offers a vast suite of security tools and certifications, appealing to highly regulated industries.
  • Heroku: While focused on security, it may not match the granular control demanded by enterprises needing to adhere to stringent security standards (i.e., HIPAA, PCI DSS).

Managing Complexity

  • AWS Expertise: Enterprises often have (or can hire) teams with the technical knowledge to manage complex AWS architectures.
  • Heroku Limitation: Simplicity, while a boon in many cases, can become a hindrance when dealing with highly customized enterprise systems.

Vendor Lock-In

  • AWS Awareness: AWS provides flexibility but can lead to vendor lock-in if you heavily rely on proprietary services.
  • Multi-Cloud Strategies: Large enterprises often distribute workloads across multiple providers for risk mitigation and to leverage specific strengths.

Hybrid Possibilities

  • AWS Backbone: Use AWS for core infrastructure needs, such as databases and large-scale processing tasks.
  • Heroku’s Niche: Ideal for specific internal tools or developer-facing applications where its simplicity and developer experience are prioritized.

Choosing Your Cloud Partner

The “best” cloud platform isn’t a one-size-fits-all answer. The choice depends heavily on your business goals, technical expertise, and long-term growth expectations. If you’re wondering if Azure plays a role in this, it does. In fact, we’ve got a breakdown of Heroku vs Azure here.

  • Startups: Often benefit from Heroku’s rapid deployment and ease of use, allowing you to focus on building your product. Consider Elastic Beanstalk for the flexibility of AWS with some of Heroku’s developer-friendliness.
  • Enterprises: Typically gravitate towards AWS for its extensive services, security capabilities, and scalability. Carefully consider potential vendor lock-in and investigate multi-cloud options.
  • Everyone: Regardless of your needs, prioritize a provider that aligns with your technical capabilities and understands your business goals.