Selenium is a powerful tool for controlling a web browser through programs and performing browser automation. It is functional for all browsers, works on all major OS, and its scripts can be written in various programming languages, including Java, C#, and Python.

In the context of JavaScript, Selenium WebDriver is a collection of open-source APIs which are used to automate the testing of a web application. You can use Selenium WebDriver with Node.js to run browser automation tests.

The Selenium WebDriver JavaScript bindings for Node.js can be installed via the npm package manager. Here are the steps to get started:

1. Install Node.js: If you don’t have Node.js installed, you can download it from the official website.

2. Initialize a Node.js Project: Create a directory for your project and navigate to it using your command line. Run the following command to create a package.json file:

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   npm init

   Follow the prompts to configure your project.

3. Install Selenium WebDriver: Install the Selenium WebDriver package by running the following command:

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   npm install selenium-webdriver

4. Install Browser Driver: You will need a corresponding driver for the browser you intend to use. For example, if you are using Chrome, you can install the ChromeDriver by running:

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   npm install chromedriver

   Other browsers such as Firefox, Safari, and Edge will have their respective drivers.

5. Write Your Tests: You can now start writing your Selenium tests using JavaScript in your project directory. Here’s a basic example to get started with Chrome:

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   const { Builder, By } = require('selenium-webdriver'); const chrome = require('selenium-webdriver/chrome'); const driver = new Builder() .forBrowser('chrome') .setChromeOptions(new chrome.Options()) .build(); driver.get('http://www.google.com'); driver.findElement(By.name('q')).sendKeys('Selenium'); driver.findElement(By.name('btnG')).click(); driver.quit();

   This code opens Google, searches for “Selenium,” and then closes the browser.

6. Run Your Test: Save your test as a .js file and run it using Node.js:

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   node your-test-file.js