Selenium Javascript Api Documentation

Selenium Javascript Api Documentation

4 min read Jun 18, 2024
Selenium Javascript Api Documentation

Selenium JavaScript API Documentation

The Selenium JavaScript API is a powerful tool for automating web browser interactions. It provides a wide range of methods and properties for interacting with web elements, navigating pages, handling events, and more. This documentation will guide you through the essential aspects of the API and how to utilize it effectively.

Getting Started

To use the Selenium JavaScript API, you need to include the Selenium WebDriver library in your project. You can do this by using a package manager like npm or yarn:

npm install selenium-webdriver

Once installed, you can import the necessary classes in your JavaScript code:

const { Builder, By, Key, until } = require('selenium-webdriver');

Building a WebDriver Instance

The Builder class is responsible for creating a WebDriver instance. You can specify the desired browser using the forBrowser() method:

const driver = new Builder().forBrowser('chrome').build();

This code creates a WebDriver instance that uses the Chrome browser. You can choose other browsers like Firefox, Safari, or Edge by passing their corresponding browser names.

Navigating to Websites

The driver.get() method allows you to navigate to a specific URL:

driver.get('https://www.example.com');

Finding Web Elements

Selenium provides several methods for finding web elements on a page:

  • By ID: driver.findElement(By.id('elementId'))
  • By CSS Selector: driver.findElement(By.css('.elementClass'))
  • By XPath: driver.findElement(By.xpath('//div[@id="elementId"]'))
  • By Name: driver.findElement(By.name('elementName'))
  • By Tag Name: driver.findElement(By.tagName('div'))

Interacting with Web Elements

Once you have located a web element, you can interact with it using various methods:

  • Clicking: element.click()
  • Sending Keys: element.sendKeys('Hello world!')
  • Getting Text: element.getText()
  • Getting Attributes: element.getAttribute('href')

Handling Events

Selenium allows you to wait for specific events to occur before proceeding with your automation script:

  • Waiting for an element to be present: driver.wait(until.elementLocated(By.id('elementId')), 10000);
  • Waiting for an element to be clickable: driver.wait(until.elementToBeClickable(By.id('elementId')), 10000);
  • Waiting for an element to be visible: driver.wait(until.elementIsVisible(By.id('elementId')), 10000);

Closing the Browser

After completing your automation tasks, it's essential to close the browser window using the driver.quit() method:

driver.quit();

Advanced Features

The Selenium JavaScript API offers many other features, including:

  • Taking Screenshots: driver.takeScreenshot().then(data => { /* Process the screenshot data */ });
  • Handling JavaScript Alerts: driver.switchTo().alert().accept();
  • Frame and Window Switching: driver.switchTo().frame('frameName');
  • Working with Cookies: driver.manage().getCookies().then(cookies => { /* Process the cookies */ });

Conclusion

The Selenium JavaScript API is a versatile and powerful tool for automating web browser interactions. By following this documentation, you can effectively utilize the API to create automation scripts that perform various tasks, such as web testing, data scraping, and more. Remember to refer to the official Selenium documentation for more detailed information and advanced usage scenarios.