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DOM Manipulation

Targeted practice on DOM Manipulation interview questions
10 solved practice questions
Curated by ex-interviewers
Time efficient

Dive into the world of element selection and modification in the DOM. Practice selecting elements using CSS selectors, traverse the DOM hierarchy, and manipulate their properties, content, and styles.

  • getElementsByClassNameImplement a function to get all DOM elements that contain the specified classes
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  • getElementsByStyleImplement a function to get all DOM elements that are rendered using the specified style
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  • getElementsByTagNamePremiumImplement a function to get all DOM elements that match a tag
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  • getElementsByTagNameHierarchyPremiumImplement a function to get all DOM elements that match a tag hierarchy
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DOM manipulation interview questions for front end interviews

DOM manipulation is a core skill that every front end developer must master, not just because it's frequently tested in interviews, but because it is integral to creating dynamic, interactive, and efficient web applications. Effective DOM manipulation ensures that your applications are not only interactive but also performant, avoiding issues like sluggish performance and slow page loads. Additionally, mastering this skill ensures your code is cross-browser compatible, providing a consistent experience across all platforms. Moreover, a deep understanding of DOM manipulation forms the foundation for effectively using modern JavaScript frameworks like React, Angular, and Vue.js.

Our DOM Manipulation focus area is designed to help you build expertise in this essential aspect of web development. You'll dive into topics like selecting elements using CSS selectors, navigating the DOM tree, and dynamically altering element properties, content, and styles.

Our platform provides an interactive learning experience, allowing you to practice directly in your browser on questions that simulate real-world scenarios. Each practice question is supported by in-depth solutions crafted by ex-interviewers from top tech companies, ensuring you gain practical and applicable knowledge of DOM manipulation.

Whether you're just beginning with DOM manipulation or looking to polish your existing skills, this focus area equips you with the thorough preparation needed to excel in front end interviews and beyond.

Key features

  1. Crafted by big tech ex-interviewers: Every question, solution, test case, and focus area has been meticulously crafted by engineers who have conducted numerous interviews at top tech companies. Their expertise ensures that all content is high-quality, directly relevant, and finely tuned to the needs of front end interviews.
  2. Comprehensive practice questions: This focus area offers a broad range of realistic, challenging questions that align with the latest practices in front end development. These questions are carefully chosen to ensure you gain proficiency in the specific challenges of DOM manipulation.
  3. Clear and comprehensive solutions: Each question comes with an in-depth solution that breaks down the correct approach, explaining both the "how" and "why" behind the answers. This helps you solidify your understanding of DOM manipulation.
  4. Authentic coding environment: Our coding workspace within the browser is designed to mimic the conditions of real front end coding interviews. This environment allows you to become comfortable with the tools and scenarios you'll face when tackling DOM manipulation tasks and other front end development challenges during an interview. We also include several convenience features and shortcuts to enhance the efficiency of your practice.
  5. Immediate evaluation with automated feedback: To improve your learning process, we offer automated test cases that provide instant feedback on your solutions. This immediate evaluation helps you quickly identify areas for improvement, ensuring continuous progress as you prepare for front end engineering roles.