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
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.
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.
Free Resource for Learning JavaScript with Real Interview Questions
Definitely gonna check it out! More on reddit.com
9
13
March 26, 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
14
6
October 2, 2024[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
5
2
November 27, 2023JavaScript Interview Q&A - Most common JS concepts you should know by heart
I wouldn't care if a candidate doesn't know about hoisting, debouncing and throttling. I don't see these as core JS concepts. Well, I take that back, hoisting obviously is. But I've been doing JS development since '97 professionally and I can't honestly think of a single instance where I had to know anything about hoisting. Maybe that's simply because I've always written code in a logical way, hence hoisting doesn't tend to be a factor. Debouncing and throttling are ideas you can easily learn if and when the need arise, not something you have to know cold in my opinion. The rest are reasonable to test for, though I personally wouldn't consider someone that didn't know some of them disqualified immediately. It would just be one factor among many to consider. More on reddit.com
19
34
December 11, 2023Videos
01:15:12
50 JavaScript Interview Questions Solved in 1 Hour - YouTube
Javascript Coding Interview Questions | Javascript Interview ...
14:03
Javascript Coding Interview Questions | JS Interview Questions
23:33
Top 10 JavaScript Coding Interview Question and Answers 🔥 MUST ...
JavaScript Interview Questions - Solve Coding Problems with Examples ...
13:41
10 JavaScript Interview Questions You HAVE TO KNOW - YouTube
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
March 26, 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/
Upcoming Features:
React/Visual Feedback Test Cases: Developing a system to create dynamic testing environments for React components.
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.
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.
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
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
InterviewBit
interviewbit.com › javascript-interview-questions
100+ JavaScript Interview Questions and Answers (2026) - InterviewBit
Explore 100+ JavaScript interview questions and answers for 2026, covering basics to advanced topics like closures, hoisting, promises, DOM, and ES6.
Published January 26, 2026
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
Top answer 1 of 6
4
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/ .
2 of 6
2
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 › 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.
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.
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.
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
Codinn
codinn.dev › tricky-javascript › es6789-code-snippets-interview-questions
Tricky Javascript Code Snippets Questions Asked in the Interview (es6/es7/es8/es9)
Prepare for your next 2025 Javascript Coding Interview Questions with these tricky code snippets. Covering ES6/ES7/ES8/ES9 syntax and features, this article provides examples and explanations to help you ace your interview.
GitHub
github.com › betomoedano › JavaScript-Coding-Interview-Questions
GitHub - betomoedano/JavaScript-Coding-Interview-Questions: 100+ coding interview questions related to algorithms and data structures.
100+ coding interview questions related to algorithms and data structures. - betomoedano/JavaScript-Coding-Interview-Questions
Starred by 180 users
Forked by 30 users
Languages JavaScript 99.3% | Java 0.7% | JavaScript 99.3% | Java 0.7%
Indeed
ca.indeed.com › career guide › interviewing › javascript technical coding interview questions and answers
JavaScript Technical Coding Interview Questions and Answers | Indeed.com Canada
Explore 10 JavaScript technical coding interview questions with practical sample answers and find valuable tips for answering these questions effectively.
Published June 23, 2023
HackerEarth
hackerearth.com › practice
Programming tutorials, Coding problems, and Practice questions
Practice programming skills with tutorials and practice problems of Basic Programming, Data Structures, Algorithms, Math, Machine Learning, Python. HackerEarth is a global hub of 5M+ developers.