devtools.tech | The only way to prepare for frontend interviews

Build your own Claude Code

Get Lifetime access to our premium content.

How to create a flat version of a deeply nested array? [Programming Interview Question]

44,930

How to build a custom timer hook in React.js? | useTimer | JavaScript Interview Question

36,214

Build A Mini Clone Of Google Calendar View

27,099

Implement Debounce Function | Flipkart UI - JavaScript Interview Questions

24,832

Implement Accordion Component in React.js | JavaScript Interview Question

21,914

How to implement Event Emitter in JavaScript? | Facebook Interview Question

26,596

How to implement DOM like structure tree!? | Frontend Interview Question | Advanced JavaScript

18,501

How to create OTP Input Component? | Frontend Coding Challege | JavaScript | HTML | CSS | React.js

17,476

How to build a File Explorer? Atlassian Frontend Machine Coding Round Question | JavaScript Interview Question | React.js

40,006

Build Country Capital Game | Microsoft Frontend Interview Question | JavaScript | React.js

26,548

Prettify JSON String

12

Versioned Configuration Store

36

Selectable Grid Cells

38

Group Products by Category

68

Query Builder

39

Multi-Stepper Component

96

Dynamic Currying Sum

119

Autocomplete Search Cache (LRU)

127

Delete Nested Object Property

115

Implement useDidUpdate Custom React Hook

102

Implement useFetch Custom React Hook

119

Chainable Currency Calculator

92

Async Fetcher with Error Handling

139

Count Pair Sums with Updates

89

Number to Words Converter

71

Time Since Last Train

165

Can you predict the answer? (this keyword)

4,369

Real-Time Comment Feed

125

Count Special Numbers

147

Custom React Hook for Media Query Detection

147

Tooltip for an Anchor Element

42

File Explorer II

159

Flatten Nested Object - II

227

Priority Based Data Fetching

299

Exclude Items

118

Search Page with Highlighting

72

Find Employee

302

Spreadsheet Grid

356

Expense Split Manager

165

Resolve Function Values in a Nested Object

203