how to create a chrome extension in javascript

To create a Chrome extension using JavaScript, follow these steps:

1. Create a new folder for your extension and add a manifest.json file with the following code:

index.tsx
{
  "name": "My Extension",
  "version": "1.0",
  "manifest_version": 2,
  "description": "Description of my extension",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_popup": "popup.html"
  }
}
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2. Create an HTML file named popup.html for the extension popup window.

3. Write the extension logic in a separate JavaScript file.

4. Load the extension into Chrome by going to chrome://extensions in the browser, enabling developer mode, and selecting "Load unpacked extension" to choose the folder containing your extension.

5. Test your extension by clicking the browser action icon and verifying that the popup window appears and the logic works as expected.

For more information and advanced topics on building extensions, refer to the official Chrome Extension documentation: https://developer.chrome.com/docs/extensions/