Explore Clientside
Unlock 120+ Interview QuestionsPick your adventure
Javascript MasteryExercises designed to help you practice your skills in a more interactive way. Each exercise has a set of unit tests so you never miss an edge case.
Reverse String
Beginner / Free
Variable Scope
Beginner / Free
Is String or Number
Beginner / Free
Concatenate Arrays
Beginner / Free
Find Largest Number
Beginner / Free
Remove First Element
Beginner / Free
Filtering Arrays
Beginner / Free
Rectangle Area
Beginner / Free
Add Method to Object
Beginner / Free
Access Nested Object
Beginner / Free
Add Element
Beginner / Free
Is Even
Beginner / Free
Fahrenheit to Celcius
Beginner / Free
Absolute Value
Beginner / Free
Simple Arithmetic
Beginner / Free
Check If All Values are Strings using every()
Beginner / Free
Check If Any Object Has a Certain Property using some()
Beginner / Free
Find Index of First Negative Number using findIndex()
Beginner / Free
Find First Even Number using find()
Beginner / Free
Find Maximum Number using reduce()
Beginner / Free
Filter Even Numbers using filter()
Beginner / Free
Sum Array
Beginner / Free
Find Average
Beginner / Free
Count Occurrences
Beginner / Free
Reverse String
Beginner / Free
Find Max
Beginner / Free
Count Characters
Easy / Free
Looped Sum
Beginner / Free
Sum of a Range
Beginner / Free
Sum of Odd Numbers
Beginner / Free
Countdown
Beginner / Free
Reverse String
Beginner / Free
First Names
Beginner / Free
Remove First Two
Easy / Free
First 2 Sum
Beginner / Free
Check If All Values are Strings using every()
Beginner / Free
Check If Any Object Has a Certain Property using some()
Beginner / Free
Find Index of First Negative Number using findIndex()
Beginner / Free
Find First Even Number using find()
Beginner / Free
Find Maximum Number using reduce()
Beginner / Free
Filter Even Numbers using filter()
Beginner / Free
Sum Array
Beginner / Free
Find Index
Beginner / Free
Concatenate Arrays
Beginner / Free
Find Largest Number
Beginner / Free
Remove First Element
Beginner / Free
Filtering Arrays
Beginner / Free
Add Element
Beginner / Free
First Names
Beginner / Free
Log Name
Beginner / Free
Destructure Rest
Beginner / Free
Default to New York
Beginner / Free
Check If All Values are Strings using every()
Beginner / Free
Check If Any Object Has a Certain Property using some()
Beginner / Free
Find Index of First Negative Number using findIndex()
Beginner / Free
Find First Even Number using find()
Beginner / Free
Calculator
Beginner / Free
Rectangle Area
Beginner / Free
Add Method to Object
Beginner / Free
Access Nested Object
Beginner / Free