In this article, we will mention 10 JavaScript challenges to practice online. These coding challenges are designed to test and improve your understanding of the core concepts of JavaScript. Each Challenge presents a problem to solve and requires you to write code to implement a solution. You can send the answers using the form below

List of 10 Javascript coding challenges

1. Reverse a string
2. FizzBuzz
3. Palindrome checker
4. Longest common prefix
5. Binary search
6. Implement a stack
7. Implement a queue
8. Anagram checker
9. Maximum subarray sum
10. Remove duplicates from an array.

1) Reverse a string: Write a JavaScript function that takes a String as an argument and returns the string reversed. For example, takes the string “HELLO” and return this string reversed “OLLEH”.

2) FizzBuzz: FizzBuzz is a classic coding challenge that is used to test a developer’s ability to handle basic control flow statements. The goal of this challenge is to print out the numbers from 1 to n, replacing numbers divisible by 3 with “Fizz”, numbers divisible by 5 with “Buzz”, and numbers divisible by both 3 and 5 with “FizzBuzz”. You will need to use a for loop to iterate through the numbers from 1 to n and use conditional statements to determine which string to print for each number.

3) Palindrome checker: The next challenge is to write a function that checks if a string is a palindrome. A palindrome is a word or phrase that reads the same forwards and backward. To solve this challenge, you will need to loop through the characters in the string and compare the characters at the corresponding positions from the start and end of the string. If all characters match, the string is a palindrome.

4) Longest common prefix: The goal of this challenge is to write a function that takes an Array of strings as input and returns the longest common prefix of the strings. A common prefix is a substring that is shared by all the strings in the array. To solve this challenge, you will need to loop through the characters in the first string and compare them to the corresponding characters in the other strings. If a mismatch is found, you should return the prefix up to that point.

5) Binary search: Binary search is an algorithm for finding a target value in a sorted array. The goal of this challenge is to write a function that implements binary search in JavaScript. To solve this challenge, you will need to split the array in half and compare the middle element to the target value. If the target value is less than the middle element, you should repeat the search on the left half of the array. If the target value is greater than the middle element, you should repeat the search on the right half of the array. If the target value is equal to the middle element, you should return the index of that element.

6) Implement a stack: A stack is a data structure that operates on the principle of Last In First Out (LIFO). The goal of this challenge is to write a program that implements a stack in JavaScript. You will need to create a class or object that has methods to push elements onto the stack, pop elements off the stack, and peek at the top element of the stack without removing it.

7) Implement a queue: A queue is a data structure that operates on the principle of First In First Out (FIFO). The goal of this challenge is to write a program that implements a queue in JavaScript. You will need to create a class or object that has methods to enqueue elements into the queue, dequeue elements from the queue, and peek at the front element of the queue without removing it.

8) Anagram checker: An anagram is a word or phrase formed by rearranging the letters of a different word or phrase. The goal of this challenge is to write a function that takes two strings as input and returns a boolean indicating whether they are anagrams. To solve this challenge, you will need to write a function that counts the frequency of each character in both strings and compares the counts. If the counts match, the strings are anagrams.

9) Maximum subarray sum: The maximum subarray sum problem is a classic coding challenge that involves finding the contiguous subarray in an array of numbers with the largest sum. The goal is to write a function that takes an array of numbers as input and returns the maximum sum of a subarray.

10) Remove duplicates from an array: Removing duplicates from an array is a common coding challenge that involves removing all duplicate elements from a given array and returning a new array with only unique elements. The goal is to write a function that takes an array as input and returns a new array with the duplicates removed.

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