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 info S souravsharma098 Follow Improve Article Tags : JavaScript Web Technologies JavaScript-DSA JavaScript-RegExp JavaScript-Questions +1 More Explore JavaScript BasicsIntroduction to JavaScript4 min readVariables and Datatypes in JavaScript6 min readJavaScript Operators5 min readControl Statements in JavaScript4 min readArray & StringJavaScript Arrays7 min readJavaScript Array Methods7 min readJavaScript Strings6 min readJavaScript String Methods9 min readFunction & ObjectFunctions in JavaScript5 min readJavaScript Function Expression3 min readFunction Overloading in JavaScript4 min readObjects in Javascript4 min readJavaScript Object Constructors4 min readOOPObject Oriented Programming in JavaScript3 min readClasses and Objects in JavaScript4 min readWhat Are Access Modifiers In JavaScript ?5 min readJavaScript Constructor Method7 min readAsynchronous JavaScriptAsynchronous JavaScript2 min readJavaScript Callbacks4 min readJavaScript Promise4 min readEvent Loop in JavaScript4 min readAsync and Await in JavaScript2 min readException HandlingJavascript Error and Exceptional Handling6 min readJavaScript Errors Throw and Try to Catch2 min readHow to create custom errors in JavaScript ?2 min readJavaScript TypeError - Invalid Array.prototype.sort argument1 min readDOMHTML DOM (Document Object Model)9 min readHow to select DOM Elements in JavaScript ?3 min readJavaScript Custom Events4 min readJavaScript addEventListener() with Examples9 min readAdvanced TopicsClosure in JavaScript4 min readJavaScript Hoisting6 min readJavascript Scope3 min readJavaScript Higher Order Functions7 min readDebugging in JavaScript4 min read Like