Basic Interview Questions Dom Traversal Node.Js

Basic Interview Questions Dom Traversal Node.Js

Common Node.js DOM Traversal Interview Questions

Basic Interview Questions Dom Traversal Node.Js

DOM traversal is a fundamental aspect of Node.js development, enabling developers to navigate and manipulate the Document Object Model (DOM) of HTML documents. It allows the creation of dynamic and interactive web applications by accessing, modifying, and adding elements within the DOM. Understanding DOM traversal helps developers effectively build and maintain complex front-end applications, ensuring their responsiveness and user-friendly design.

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1 - How do you access the document's root element?

 js

const root = document.documentElement;

2) How do you select elements by their tag name?

 js

const elements = document.getElementsByTagName("p");

3) How do you select elements by their class name?

 js

const elements = document.getElementsByClassName("my class");

4) How do you select elements by their ID?

 js

const element = document.getElementById("my id");

5) How do you select the first child element of an element?

 js

const firstChild = element.firstElementChild;

6) How do you select the last child element of an element?

 js

const lastChild = element.lastElementChild;

7) How do you select the parent element of an element?

 js

const parent = element.parentElement;

8) How do you select all of the siblings of an element?

 js

const siblings = element.parentElement.children;

9) How do you select the previous sibling of an element?

 js

const previousSibling = element.previousElementSibling;

10) How do you select the next sibling of an element?

 js

const nextSibling = element.nextElementSibling;

11 - How do you select all of the descendants of an element?

 js

const descendants = element.querySelectorAll("*");

12) How do you select all of the ancestors of an element?

 js

const ancestors = element.path;

13) How do you check if an element contains a specific class?

 js

const hasClass = element.classList.contains("my class");

14) How do you add a class to an element?

 js

element.classList.add("my class");

15) How do you remove a class from an element?

 js

element.classList.remove("my class");

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9. Course Overview
10. This course covers fundamental interview questions in JavaScript's Document Object Model (DOM) traversal using Node.js. It includes topics such as navigating the DOM tree, selecting elements, manipulating attributes, and event handling.
11. Course Description
12. This course will teach you the basic interview questions related to Node.js DOM traversal. You'll learn how to manipulate the DOM using Node.js, and how to retrieve and modify elements and their attributes. The course will also cover the basics of recursion and traversing the DOM tree.
13. Key Features
14. 1 - Comprehensive Tool Coverage: Provides hands-on training with a range of industry-standard testing tools, including Selenium, JIRA, LoadRunner, and TestRail.
15. 2) Practical Exercises: Features real-world exercises and case studies to apply tools in various testing scenarios.
16. 3) Interactive Learning: Includes interactive sessions with industry experts for personalized feedback and guidance.
17. 4) Detailed Tutorials: Offers extensive tutorials and documentation on tool functionalities and best practices.
18. 5) Advanced Techniques: Covers both fundamental and advanced techniques for using testing tools effectively.
19. 6) Data Visualization: Integrates tools for visualizing test metrics and results, enhancing data interpretation and decision-making.
20. 7) Tool Integration: Teaches how to integrate testing tools into the software development lifecycle for streamlined workflows.
21. 8) Project-Based Learning: Focuses on project-based learning to build practical skills and create a portfolio of completed tasks.
22. 9) Career Support: Provides resources and support for applying learned skills to real-world job scenarios, including resume building and interview preparation.
23. 10) Up-to-Date Content: Ensures that course materials reflect the latest industry standards and tool updates.

Benefits of taking our course

 Functional Tools

1 - Node.js:

     A JavaScript runtime environment for server side development.

     Enables access to the DOM (Document Object Model) through its built in `jsdom` library.

2) jsdom:

     A headless JavaScript environment that simulates a web browser's DOM.

     Allows for testing DOM traversal and manipulation without the need for a browser.

3) Puppeteer:

     A headless Chrome browser that provides access to the real Chrome DOM.

     Can be used for more advanced DOM traversal and automation tasks.

4) XMLHttpRequest (XHR):

     A JavaScript object that allows for making HTTP requests to a server.

     Used to fetch HTML and XML documents for DOM analysis.

5) Cheerio:

     A jQuery like library for Node.js that simplifies DOM traversal and manipulation.

     Offers a wide range of functions for selecting, filtering, and modifying DOM elements.

6) JSDom:

     A headless HTML DOM implementation.

     Allows for creating and manipulating HTML documents in memory, providing a way to test and analyze DOM structures without the need for a browser.

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