How To Create a Google Chrome Extension: Step-by-Step Guide-JS Tutorial-php.cn

Home

Web Front-end

JS Tutorial

How To Create a Google Chrome Extension: Step-by-Step Guide

Barbara Streisand

Jan 03, 2025 pm 06:52 PM

How To Create a Google Chrome Extension: Step-by-Step Guide

Creating a Google Chrome extension is a great way to enhance your web experience or showcase your web development skills. Chrome extensions are small software programs that customize your browsing experience by extending Chrome's functionality. Here’s a quick guide to help you create your own Chrome extension from scratch.

Step 1: Understand the Basics

Before diving in, understand the key components of a Chrome extension:

Manifest file (manifest.json): The configuration file for your extension.
HTML/CSS/JavaScript files: To define the extension’s interface and functionality.
Icons and other assets: For branding and a polished look.

Step 2: Set Up Your Project

Create a folder for your extension files. This will hold all the necessary files.
Inside this folder, create a file named manifest.json.

Step 3: Write the Manifest File

The manifest.json is the blueprint of your extension. Here's a basic example:

{
  "manifest_version": 3,
  "name": "My First Chrome Extension",
  "version": "1.0",
  "description": "A simple Chrome extension to demonstrate functionality.",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": ["activeTab"],
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon48.png"
  }
}

Copy after login

Explanation:

"manifest_version": 3 specifies the use of Manifest V3, the latest version.
"name" and "version" describe the extension.
"action" links the popup that will appear when the extension icon is clicked.

Step 4: Create a Popup Interface

Create an popup.html file in the same folder:

<!DOCTYPE html>
<html>
<head>
  <title>My Extension</title>
</head>
<body>
  <h1>Hello, Chrome!</h1>
  <button>
 
 
 
<ol>
<li>Add some interactivity with JavaScript. Create popup.js:
</li>
</ol>
 
<pre class="brush:php;toolbar:false">document.getElementById("changeColor").addEventListener("click", function() {
  document.body.style.backgroundColor = "#FFD700";
});

Copy after login

Step 5: Add Icons

Prepare icons in three sizes (16x16, 48x48, and 128x128 pixels) and place them in your project folder.

Step 6: Load the Extension in Chrome

Open Chrome and go to chrome://extensions/.
Enable Developer Mode (toggle in the top right corner).
Click on Load Unpacked and select your project folder.

Step 7: Test Your Extension

Click the extension icon in Chrome's toolbar and see your popup in action. Test all features and ensure everything works as expected.

Optional Enhancements

Add background scripts to perform actions even when the popup is closed.
Use content scripts to interact with web pages directly.
Explore advanced APIs like chrome.storage for saving data or chrome.runtime for communicating between scripts.

Final Thoughts:
Building a Chrome extension is a rewarding process that can scale from simple tools to powerful apps. With this basic structure, you can start small and expand your extension as you learn more. Dive into Chrome’s developer documentation for more advanced features.

The above is the detailed content of How To Create a Google Chrome Extension: Step-by-Step Guide. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress images for free

Clothoff.io

AI clothes remover

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

How to fix KB5055523 fails to install in Windows 11?

3 weeks ago By DDD

How to fix KB5055518 fails to install in Windows 10?

3 weeks ago By DDD

Roblox: Grow A Garden - Complete Mutation Guide

2 weeks ago By DDD

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys

3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

How to fix KB5055612 fails to install in Windows 10?

3 weeks ago By DDD

Hot Tools

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial

1662

CakePHP Tutorial

1419

Laravel Tutorial

1313

PHP Tutorial

1262

C# Tutorial

1235

Related knowledge

Demystifying JavaScript: What It Does and Why It Matters Apr 09, 2025 am 12:07 AM

JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.

The Evolution of JavaScript: Current Trends and Future Prospects Apr 10, 2025 am 09:33 AM

The latest trends in JavaScript include the rise of TypeScript, the popularity of modern frameworks and libraries, and the application of WebAssembly. Future prospects cover more powerful type systems, the development of server-side JavaScript, the expansion of artificial intelligence and machine learning, and the potential of IoT and edge computing.

JavaScript Engines: Comparing Implementations Apr 13, 2025 am 12:05 AM

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

JavaScript: Exploring the Versatility of a Web Language Apr 11, 2025 am 12:01 AM

JavaScript is the core language of modern web development and is widely used for its diversity and flexibility. 1) Front-end development: build dynamic web pages and single-page applications through DOM operations and modern frameworks (such as React, Vue.js, Angular). 2) Server-side development: Node.js uses a non-blocking I/O model to handle high concurrency and real-time applications. 3) Mobile and desktop application development: cross-platform development is realized through ReactNative and Electron to improve development efficiency.

Python vs. JavaScript: The Learning Curve and Ease of Use Apr 16, 2025 am 12:12 AM

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

How to Build a Multi-Tenant SaaS Application with Next.js (Frontend Integration) Apr 11, 2025 am 08:22 AM

This article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base

From C/C to JavaScript: How It All Works Apr 14, 2025 am 12:05 AM

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

Building a Multi-Tenant SaaS Application with Next.js (Backend Integration) Apr 11, 2025 am 08:23 AM

I built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing

See all articles