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]

44,293

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

35,853

Build A Mini Clone Of Google Calendar View

26,770

Implement Debounce Function | Flipkart UI - JavaScript Interview Questions

24,500

Implement Accordion Component in React.js | JavaScript Interview Question

21,701

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

26,273

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

18,293

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

17,322

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

39,729

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

26,202

Versioned Configuration Store

2

Selectable Grid Cells

14

Group Products by Category

39

Query Builder

28

Multi-Stepper Component

89

Dynamic Currying Sum

97

Autocomplete Search Cache (LRU)

121

Delete Nested Object Property

100

Implement useDidUpdate Custom React Hook

100

Implement useFetch Custom React Hook

118

Chainable Currency Calculator

85

Async Fetcher with Error Handling

136

Count Pair Sums with Updates

86

Number to Words Converter

69

Time Since Last Train

152

Can you predict the answer? (this keyword)

4,195

Real-Time Comment Feed

124

Count Special Numbers

145

Custom React Hook for Media Query Detection

145

Tooltip for an Anchor Element

42

File Explorer II

150

Flatten Nested Object - II

219

Priority Based Data Fetching

275

Exclude Items

118

Search Page with Highlighting

72

Find Employee

294

Spreadsheet Grid

351

Expense Split Manager

162

Resolve Function Values in a Nested Object

203

Repeat Characters

162