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

Get started with free interview questions

Get Lifetime access to our premium content.

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

46,910

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

37,430

Build A Mini Clone Of Google Calendar View

28,086

Implement Debounce Function | Flipkart UI - JavaScript Interview Questions

25,897

Implement Accordion Component in React.js | JavaScript Interview Question

22,614

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

27,542

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

19,176

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

17,985

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

40,952

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

27,812

Implement Video Ranking

29

Prettify JSON String

56

Versioned Configuration Store

58

Selectable Grid Cells

74

Group Products by Category

89

Query Builder

58

Multi-Stepper Component

168

Dynamic Currying Sum

149

Autocomplete Search Cache (LRU)

143

Delete Nested Object Property

130

Implement useDidUpdate Custom React Hook

131

Implement useFetch Custom React Hook

168

Chainable Currency Calculator

101

Async Fetcher with Error Handling

150

Count Pair Sums with Updates

93

Number to Words Converter

76

Time Since Last Train

176

Can you predict the answer? (this keyword)

4,863

Real-Time Comment Feed

137

Count Special Numbers

157

Custom React Hook for Media Query Detection

157

Tooltip for an Anchor Element

57

File Explorer II

170

Flatten Nested Object - II

257

Priority Based Data Fetching

321

Exclude Items

123

Search Page with Highlighting

75

Find Employee

321

Spreadsheet Grid

367

Expense Split Manager

174