I have faced questions about truthiness, like is an empty string true or false? What about zero or undefined? Also got questions about closures, handling promises, and ES6 syntax. Most blog articles about common JavaScript developer questions will cover all of these topics. I bet you'll do great! Answer from takeyoufergranite on reddit.com
Roadmap
roadmap.sh › questions › javascript-coding
Top 80 JavaScript Coding Interview Questions and Answers
Master your next interview with these top 80 JavaScript coding interview questions and answers, great for all experience levels.
CoderPad
coderpad.io › interview-questions › javascript-interview-questions
30 JavaScript Interview Questions For Tech Interviews ( 2023 )
December 6, 2024 - To evaluate the JavaScript skills of developers during coding interviews, we've provided realistic coding exercises and JavaScript interview questions below.
Free Resource for Learning JavaScript with Real Interview Questions
Definitely gonna check it out! More on reddit.com
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May 14, 2024[AskJS] What are the interview questions you have faced as a JavaScript developer?
I have faced questions about truthiness, like is an empty string true or false? What about zero or undefined? Also got questions about closures, handling promises, and ES6 syntax. Most blog articles about common JavaScript developer questions will cover all of these topics. I bet you'll do great! More on reddit.com
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October 2, 2024Reverse Pagination - Efficient way : r/reactjs
[AskJS] Technical test questions about javascript and related framework
Just use Google. https://github.com/sudheerj/javascript-interview-questions The best advice I can give you is to not bullshit about things you don't understand, any interviewer with more experience than you will see right through it, and nobody wants to work with someone who can't admit they don't know everything. More on reddit.com
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November 27, 2023Videos
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GeeksforGeeks
geeksforgeeks.org › javascript › javascript-coding-questions-and-answers
JavaScript Coding Questions and Answers - GeeksforGeeks
August 5, 2025 - These Top 50 coding questions and answers will help you to improve your coding concept in JavaScript. If you're a beginner and want to gather some real-time coding examples, then start here. This section will help you understand the fundamentals and solve simple coding problems. This code splits the string into an array of characters using the split() method, reverses the array, and joins it back into a string using the join() method.
Reddit
reddit.com › r/frontend › free resource for learning javascript with real interview questions
r/Frontend on Reddit: Free Resource for Learning JavaScript with Real Interview Questions
May 14, 2024 -
I’ve been working on a project to help people dive deeper into JavaScript and prepare for web dev interviews. It’s called CodeClimbJS, and it offers coding exercises based on actual javascript interview exercises. It’s completely free, and I’m passionate about supporting the developer community.
Link: https://codeclimbjs.com/
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Upcoming Features:
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React/Visual Feedback Test Cases: Developing a system to create dynamic testing environments for React components.
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Video Tutorials: Planning to offer tutorials on how I built this web app, it uses NextJS 14 and was mainly created to deep dive into Next new features.
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As the project is still in its early stages, I would love to hear your feedback to improve the platform. Your insights will help me refine the test cases and enhance the overall user experience.
Thank you for checking out CodeClimbJS. I hope you find it a valuable tool for your learning journey!
PS: I know how much a lot of devs hate this kind of challenges but they helped me a lot learning sometimes overlooked topics.
Best,
F.
GitHub
github.com › sudheerj › javascript-interview-questions
GitHub - sudheerj/javascript-interview-questions: List of 1000 JavaScript Interview Questions · GitHub
Immutability: Pure functions align with ES6 best practices, such as preferring const over let, supporting safer and more maintainable code. No side effects: Reduces bugs related to shared state or mutation.
Author sudheerj
Medium
medium.com › deno-the-complete-reference › 10-javascript-coding-interview-questions-part-1-a0e5bb606eaf
10 JavaScript coding interview questions — Part 1 | Tech Tonic
August 21, 2025 - Explore 10 commonly asked JavaScript coding interview questions with answers
InterviewBit
interviewbit.com › javascript-interview-questions
60+ Most Important JavaScript Interview Questions and Answers (2026)
Explore 60+ JavaScript interview questions and answers for 2026, covering basics to advanced topics like closures, hoisting, promises, DOM, and ES6.
Published 2 days ago
Codecademy
codecademy.com › learn › technical-interview-practice-with-javascript
Technical Interview Practice with JavaScript | Codecademy
Learn key interview preparation skills and practice algorithmic problem-solving in JavaScript
Reddit
reddit.com › r/javascript › [askjs] what are the interview questions you have faced as a javascript developer?
r/javascript on Reddit: [AskJS] What are the interview questions you have faced as a JavaScript developer?
October 2, 2024 -
I have an interview tomorrow basically, I come from a CMS background with Drupal and Front end. I just want to make sure I am aware of most of the answers to the common questions
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I've also struggled with these tech interviews, but I finally managed to memorise tons of questions they like to ask on tech interviews after playing with JS Interview Hell - https://www.javascript-interview-hell.com/ .
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I have faced questions about truthiness, like is an empty string true or false? What about zero or undefined? Also got questions about closures, handling promises, and ES6 syntax. Most blog articles about common JavaScript developer questions will cover all of these topics. I bet you'll do great!
GreatFrontEnd
greatfrontend.com › blog › 50-must-know-javascript-interview-questions-by-ex-interviewers
50 Must-know JavaScript Interview Questions by Ex-interviewers | Blog
July 10, 2025 - Functional programming: Encourages declarative and clean code. Powerful: Can replace loops or multiple utility methods in a single chain. Practice implementing Array.protoype.reduce on GreatFrontEnd -> Flattening transforms a nested array into a single-level array, making it more manageable. Since ES2019, JavaScript provides the Array.prototype.flat() method for this.
GreatFrontEnd
greatfrontend.com › questions › javascript-interview-questions
JavaScript Interview Questions | Solutions by Ex-FAANG interviewers
480+ most important JavaScript interview questions, from library APIs and utility functions to algorithms and UI components.
Front End Interview Handbook
frontendinterviewhandbook.com › javascript coding
JavaScript Interview Questions (Machine Coding) for Front End Interviews | The Official Front End Interview Handbook 2026
3 weeks ago - Master JavaScript machine coding for front end interviews. Practice debounce, throttle, Promise.all & essential utilities with real examples.
Medium
medium.com › dev-simplified › javascript-interview-coding-challenge-f45b260c9bbd
JavaScript Interview Coding Challenge | by Neha Gupta | Dev Simplified | Medium
April 22, 2025 - JavaScript Interview Coding Challenge Question on event loop fundamentals like microtask, macrotask, call stack. If you’ve ever walked into a JavaScript interview and thought, “This won’t be …
Maxence Poutord
maxpou.fr › blog › js-exercises-explained
Typical JavaScript interview exercises (explained)
October 16, 2017 - On the previous code, we set the bark function on another function (Dog()), which is also a constructor. Is it possible because in JavaScript, functions are objects. ... 👎 (the dirty one). fido.bark isn’t a function but Dog.bark is. So let’s use this one and solve the this issue with a function.prototype.bind() as in the exercise above:
Keka
keka.com › javascript-coding-interview-questions-and-answers
JavaScript Coding Interview Questions and Answers List | Keka
... Some of the common JavaScript coding interview questions typically cover these topics: checking for palindrome, finding missing/largest numbers, object manipulation, removing duplicates, merging, etc.
GreatFrontEnd
greatfrontend.com › blog › 10-must-know-javascript-coding-interview-questions
10 Must-know JavaScript Coding Interview Questions | Blog
March 28, 2025 - Here's a basic implementation of a deep equal function in JavaScript: ... In this example, the deepEqual function recursively checks if two objects (or arrays) are equal. It first checks if the two objects are the same reference. If not, it verifies that both are objects and not null. Then, it compares the keys and values recursively to ensure all nested structures are equal. This topic is valuable for front-end interviews as it tests a candidate's understanding of deep vs.
LeetCode
leetcode.com › problemset › javascript
LeetCode - The World's Leading Online Programming Learning Platform
Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.
Toptal
toptal.com › developers › javascript › interview-questions
Top 37 Technical JavaScript Interview Questions & Answers [2026] | Toptal®
This behavior also argues for following the convention of placing an opening curly brace at the end of a line in JavaScript, rather than on the beginning of a new line. As shown here, this becomes more than just a stylistic preference in JavaScript. ... What will the code below output?
Programiz PRO
programiz.pro › community-challenges › javascript
JavaScript Coding Challenges | Programiz PRO
Interview Questions · Java Certification · DSA with Python · DSA with C++ Complexity Calculation · DSA Certification · Skill · HTML Fundamentals · CSS Fundamentals · Figma to Code · Responsive Design · JS Interactivity · Skill · Game Logic · Whack A Mole · JavaScript Essentials ·
LeetCode
leetcode.com › explore › interview › card › top-interview-questions-easy
LeetCode's Interview Questions Easy Collection.
LeetCode Explore is the best place for everyone to start practicing and learning on LeetCode. No matter if you are a beginner or a master, there are always new topics waiting for you to explore.