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]

45,208

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

36,455

Build A Mini Clone Of Google Calendar View

27,306

Implement Debounce Function | Flipkart UI - JavaScript Interview Questions

25,044

Implement Accordion Component in React.js | JavaScript Interview Question

22,055

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

26,818

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

18,630

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

17,578

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

40,202

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

26,820

Prettify JSON String

35

Versioned Configuration Store

39

Selectable Grid Cells

41

Group Products by Category

74

Query Builder

45

Multi-Stepper Component

122

Dynamic Currying Sum

126

Autocomplete Search Cache (LRU)

129

Delete Nested Object Property

118

Implement useDidUpdate Custom React Hook

118

Implement useFetch Custom React Hook

136

Chainable Currency Calculator

94

Async Fetcher with Error Handling

143

Count Pair Sums with Updates

89

Number to Words Converter

73

Time Since Last Train

167

Can you predict the answer? (this keyword)

4,449

Real-Time Comment Feed

125

Count Special Numbers

153

Custom React Hook for Media Query Detection

150

Tooltip for an Anchor Element

46

File Explorer II

163

Flatten Nested Object - II

238

Priority Based Data Fetching

303

Exclude Items

121

Search Page with Highlighting

73

Find Employee

303

Spreadsheet Grid

358

Expense Split Manager

165

Resolve Function Values in a Nested Object

204