Introduction
Selenium is an automation tool used for web browser automation testing. Selenium WebDriver does, however, occasionally encounter problems while communicating with a few web components. An unexpected pop-up, for instance, may occur when a user reaches a URL and prevent the WebDriver from detecting a specific element, leading to incorrect results. In this case, JavascriptExecutor arrives on the scene.
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What is JavascriptExecutor in Selenium?
JavascriptExecutor is an interface that allows Selenium to run JavaScript. Consider JavascriptExecutor in Selenium as a means for the WebDriver to communicate with HTML components in the browser, making using it easier. JavascriptExecutor is necessary to use this method in Selenium as JavaScript is a computer language that deals with HTML in a browser.
Selenium’s JavascriptExecutor components
Two methods make up the JavascriptExecutor, which handles all crucial JavaScript interactions for Selenium.
1. The test script is run using the context of the currently chosen window or frame using the executeScript method. The method’s script is executed as an anonymous function.
The following values are returned if the script contains a return statement:
- The method returns a WebElement for an HTML element.
- The function compares Long for a decimal.
- The algorithm returns Long for a number that is not a decimal.
- The value represents a Boolean for a Boolean.
- The technique returns a String in all other situations.
2. The executeAsyncScript function runs the asynchronous JavaScript code on the active window or frame. The remainder of the page will continue to be parsed while an asynchronous script is run, improving responsiveness and application performance.
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How to use JavascriptExecutor from scratch
- Bring the package
- Establish a reference
- To use Javascript Executor methods, call them.
How JavascriptExecutor works in Selenium
- To click a button in Selenium, use JavascriptExecutor.
- Using Selenium’s JavascriptExecutor, you can transmit text and interact with checkboxes.
- Selenium uses JavascriptExecutor to update the browser window.
Why does Selenium use JavascriptExecutor?
Selenium WebDriver may occasionally be unable to carry out specific tasks or interact with specific web elements independently. In that instance, JavaScript is required to guarantee that certain activities are carried out correctly.
Imagine that a tester has created an automation script to click a few buttons, but there seems to be a problem because the script keeps failing. The tester utilises JavascriptExecutor to fix this.
Conclusion
Selenium testers must understand how to use JavascriptExecutor methods due to Selenium’s often difficult dealings with web elements in web browser automation. Executing both executeScript and executeAsyncScript is the ideal solution because it tasks all possible issues. To learn more about Selenium automation, join Selenium Training in Coimbatore at FITA Academy for the best training with career guidance.