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JavaScriptExecutor in Selenium WebDriver with Example (hard)

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Questions and Answers

Which interface helps to execute JavaScript through Selenium Webdriver?

JavaScriptExecutor

What are the two methods provided by JavaScriptExecutor?

executeScript and executeAsyncScript

When would you use JavaScriptExecutor in Selenium Webdriver?

When locators like XPath and CSS do not work

What is the purpose of the 'executeScript' method in JavaScriptExecutor?

<p>To execute JavaScript in the context of the currently selected frame or window</p> Signup and view all the answers

Do you need an extra plugin or add-on to use JavaScriptExecutor in Selenium?

<p>No, Selenium supports JavaScriptExecutor without any extra plugin or add-on</p> Signup and view all the answers

What is the purpose of the 'executeAsyncScript' method in JavaScriptExecutor?

<p>To execute asynchronous JavaScript in the context of the currently selected frame or window</p> Signup and view all the answers

What type of function does the script used in the 'executeScript' method run as?

<p>Anonymous function</p> Signup and view all the answers

What is the purpose of importing 'org.openqa.selenium.JavascriptExecutor' in the script?

<p>To use JavaScriptExecutor in Selenium</p> Signup and view all the answers

What type of values can the script used in the 'executeScript' method return?

<p>All of the above</p> Signup and view all the answers

What is the purpose of the JavaScriptExecutor interface in Selenium Webdriver?

<p>To execute JavaScript through Selenium Webdriver</p> Signup and view all the answers

Which method of JavaScriptExecutor in Selenium Webdriver allows writing tests more like normal coding?

<p>executeAsyncScript</p> Signup and view all the answers

What is the purpose of the scrollBy method in Selenium Webdriver?

<p>To scroll down by a specified number of pixels</p> Signup and view all the answers

Which method is used to set the script timeout in Selenium Webdriver?

<p>setScriptTimeout</p> Signup and view all the answers

What does the executeAsyncScript method do in Selenium Webdriver?

<p>Executes the JavaScript asynchronously</p> Signup and view all the answers

What is the purpose of the setTimeout method in JavaScript?

<p>To wait for a specified time</p> Signup and view all the answers

What is the purpose of the setScriptTimeout method in Selenium Webdriver?

<p>To set the script timeout</p> Signup and view all the answers

What does the scrollBy method do in Selenium Webdriver?

<p>Scrolls down by a specified number of pixels</p> Signup and view all the answers

What is the purpose of the executescript method in Selenium Webdriver?

<p>To execute JavaScript synchronously</p> Signup and view all the answers

What is the purpose of the executeAsyncScript method in Selenium Webdriver?

<p>To execute JavaScript asynchronously</p> Signup and view all the answers

What is the purpose of the setTimeout method in Selenium Webdriver?

<p>To wait for a specified time</p> Signup and view all the answers

Which data types can be returned by the JavaScriptExecutor in Selenium?

<p>Boolean</p> Signup and view all the answers

What is the purpose of the executeAsyncScript function in Selenium?

<p>To render the page more quickly</p> Signup and view all the answers

How do you use the JavaScriptExecutor in Selenium?

<p>Import the package and call the executeScript method</p> Signup and view all the answers

What does the executeScript method of the JavaScriptExecutor do?

<p>Performs a click on an element</p> Signup and view all the answers

In the first example provided, what is the purpose of the JavaScriptExecutor?

<p>To perform a click on a button</p> Signup and view all the answers

What is the output of the first example provided?

<p>Successful click on a button and display of an alert window</p> Signup and view all the answers

In the second example provided, what information is fetched using the JavaScriptExecutor?

<p>All of the above</p> Signup and view all the answers

What is the purpose of the executeScript method in the second example provided?

<p>To navigate to a different page</p> Signup and view all the answers

What is the output of the second example provided?

<p>Display of the URL, title name, and domain name of the site</p> Signup and view all the answers

What is the purpose of the window.location property in the second example provided?

<p>To navigate to a different page</p> Signup and view all the answers

Study Notes

JavaScriptExecutor in Selenium Webdriver

  • JavaScriptExecutor helps execute JavaScript through Selenium Webdriver
  • Two methods provided by JavaScriptExecutor: executeScript and executeAsyncScript

Methods of JavaScriptExecutor

  • executeScript method:
    • Purpose: executes a JavaScript code snippet
    • Allows executing JavaScript in the context of the current page
    • Runs the script as a function in the page
    • Can return values such as String, Long, Boolean, List, and WebElement
  • executeAsyncScript method:
    • Purpose: executes an asynchronous JavaScript code snippet
    • Allows executing asynchronous JavaScript in the context of the current page
    • Can return values such as String, Long, Boolean, List, and WebElement

Using JavaScriptExecutor

  • No extra plugin or add-on required to use JavaScriptExecutor
  • import org.openqa.selenium.JavascriptExecutor is required to use JavaScriptExecutor
  • Useful when Selenium Webdriver cannot perform an operation due to limitations

ScrollBy Method

  • scrollBy method: scrolls the current page by the specified amount
  • Purpose: simulates scrolling on the webpage

Setting Script Timeout

  • setTimeout method: sets the script timeout in milliseconds
  • setScriptTimeout method: sets the script timeout in Selenium Webdriver

Purpose of JavaScriptExecutor

  • Allows executing JavaScript code in the context of the current page
  • Enables writing tests more like normal coding
  • Helps overcome limitations of Selenium Webdriver

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