JavaScript Regular Expressions Coding Practice Problems Last Updated : 01 Feb, 2025 Comments Improve Suggest changes Like Article Like Report Regular expressions (regex) in JavaScript provide a powerful way to search, match, and manipulate text patterns. They are widely used in form validation, data extraction, text filtering, and pattern recognition. This curated list of regex-based coding problems is categorized into easy, medium, and hard levels to help you strengthen your regex skills.Regex Practice ProblemsEasyExtract the Number from the StringPrint Bracket NumberCompare two fractionsPlaying with mobile numbersConsonants and Vowels checkCheck if a string is Isogram or notCheck StringCheck Binary StringPrime StringPanagram CheckingCheck if date is validPalindromeExtraction of secret messageExtract MaximumParenthesis CheckerThe Pattern MatcherGood or Bad stringRemove SpaceRemove vowels from stringRemove consonants from a stringRemove characters from alphanumeric stringConvert a list of characters into a StringMediumValidate an IP AddressCamelCase Pattern MatchingCounting number of sentences and wordsPrint first letter of every wordGenerate IP AddressesMerging DetailsPalindromic StringsUpper Case ConversionTom and StringPrint Anagrams TogetherRemove leading zeros from an IP addressHardRegEx matchingDesign a tiny URL or URL shortenerLongest Palindrome in a StringPallindrome PatternsFind all possible palindromic partitionsRegular Expression QuizRegular Expressions and JSON Comment More infoAdvertise with us Next Article JavaScript Regular Expressions Coding Practice Problems S souravsharma098 Follow Improve Article Tags : JavaScript Web Technologies JavaScript-DSA JavaScript-RegExp JavaScript-Questions +1 More Similar Reads JavaScript RegExp (Regular Expression) A regular expression is a special sequence of characters that defines a search pattern, typically used for pattern matching within text. It's often used for tasks such as validating email addresses, phone numbers, or checking if a string contains certain patterns (like dates, specific words, etc.).I 4 min read JavaScript Regular Expressions (RegExp) Examples Regular Expressions in JavaScript provide robust pattern-matching capabilities that are useful for validating input, searching and replacing text, and more. Here, we will explore various examples demonstrating the utility of RegExp in JavaScript.1. Match a WordThe pattern /hello/ matches the string 3 min read JavaScript RegExp [^abc] Expression The [^abc] expression in JavaScript regular expressions is a negated character set. It matches any character except those specified inside the brackets. For example, [^abc] matches any character that is not a, b, or c.JavaScriptlet regex = /[^abc]/g; let str = "abcdefg"; let matches = str.match(rege 2 min read JavaScript - How Useful is Learning Regular Expressions? Regular expressions (RegExp) are an important skill for JavaScript developers that helps in text manipulation, validation, and extraction. Whether you’re working on form validations, file handling, or log parsing, mastering regular expressions can simplify your code and improve productivity. Why Lea 3 min read PHP | Regular Expressions Regular expressions commonly known as a regex (regexes) are a sequence of characters describing a special search pattern in the form of text string. They are basically used in programming world algorithms for matching some loosely defined patterns to achieve some relevant tasks. Some times regexes a 12 min read Like