Fix the Mutating Todo State
Fix a React todo toggle by updating state immutably, changing only the selected item while keeping counts, styles, and repeated clicks in sync.
Featuring
JJason Torres
React
Challenge overview
- Format
- Fix the Bug
- Category
- React
- Difficulty
- Intermediate
reacttypescriptstateimmutabilitydebugging
Keep practicing
More coding challenges
React · Intermediate
Fix the Product Search Filter
Repair a React product search so the input updates component state and filters product names immediately without case sensitivity.
View challengePython · Beginner
Fix the Python Shopping Cart Total
Fix a Python shopping cart function so it multiplies every item's price by its quantity, totals every line, and handles an empty cart.
View challengeJavaScript · Beginner
Fix the Shopping Cart Total
Fix a JavaScript cart total function so it multiplies every item's price by its quantity, includes all lines, and returns zero for an empty cart.
View challenge