Skip to content
geeksforgeeks
  • Tutorials
    • Data Structures & Algorithms
    • ML & Data Science
    • Interview Corner
    • Programming Languages
    • Web Development
    • CS Subjects
    • DevOps And Linux
    • School Learning
  • Courses
    • DSA to Development
    • Get IBM Certification
    • Newly Launched!
      • Master Django Framework
      • Become AWS Certified
    • For Working Professionals
      • Interview 101: DSA & System Design
      • Data Science Training Program
      • JAVA Backend Development (Live)
      • DevOps Engineering (LIVE)
      • Data Structures & Algorithms in Python
    • For Students
      • Placement Preparation Course
      • Data Science (Live)
      • Data Structure & Algorithm-Self Paced (C++/JAVA)
      • Master Competitive Programming (Live)
      • Full Stack Development with React & Node JS (Live)
    • Full Stack Development
    • Data Science Program
    • All Courses
  • Practice
    • GfG 160: Daily DSA
    • Problem of the Day
    • Practice Coding Problems
    • GfG SDE Sheet
  • JS Tutorial
  • JS Exercise
  • JS Interview Questions
  • JS Array
  • JS String
  • JS Object
  • JS Operator
  • JS Date
  • JS Error
  • JS Projects
  • JS Set
  • JS Map
  • JS RegExp
  • JS Math
  • JS Number
  • JS Boolean
  • JS Examples
  • JS Free JS Course
  • JS A to Z Guide
  • JS Formatter
Open In App
Next Article:
JavaScript Regular Expressions Coding Practice Problems
Next article icon

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 Problems

Easy

  • Extract the Number from the String
  • Print Bracket Number
  • Compare two fractions
  • Playing with mobile numbers
  • Consonants and Vowels check
  • Check if a string is Isogram or not
  • Check String
  • Check Binary String
  • Prime String
  • Panagram Checking
  • Check if date is valid
  • Palindrome
  • Extraction of secret message
  • Extract Maximum
  • Parenthesis Checker
  • The Pattern Matcher
  • Good or Bad string
  • Remove Space
  • Remove vowels from string
  • Remove consonants from a string
  • Remove characters from alphanumeric string
  • Convert a list of characters into a String

Medium

  • Validate an IP Address
  • CamelCase Pattern Matching
  • Counting number of sentences and words
  • Print first letter of every word
  • Generate IP Addresses
  • Merging Details
  • Palindromic Strings
  • Upper Case Conversion
  • Tom and String
  • Print Anagrams Together
  • Remove leading zeros from an IP address

Hard

  • RegEx matching
  • Design a tiny URL or URL shortener
  • Longest Palindrome in a String
  • Pallindrome Patterns
  • Find all possible palindromic partitions

Regular Expression Quiz

  • Regular Expressions and JSON

Next Article
JavaScript Regular Expressions Coding Practice Problems

S

souravsharma098
Improve
Article Tags :
  • JavaScript
  • Web Technologies
  • JavaScript-DSA
  • JavaScript-RegExp
  • JavaScript-Questions

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
    Convert user input string into regular expression using JavaScript
    In this article, we will convert the user input string into a regular expression using JavaScript.To convert user input into a regular expression in JavaScript, you can use the RegExp constructor. The RegExp constructor takes a string as its argument and converts it into a regular expression object
    2 min read
    JavaScript - How to Create Regular Expression Only Accept Special Formula?
    To ensure that a string matches a specific formula or pattern, you can use a regular expression (RegExp) in JavaScript. Here are the various ways to create a regular expression that only accepts regular formulas.1: Alphanumeric Code FormulaLet's create a regular expression that matches a formula lik
    3 min read
    Wildcard Pattern Matching in JavaScript
    In this article, we will see Pattern matching with wildcards which is an encountered problem, in the field of computer science and string manipulation. The objective is to determine whether a given wildcard pattern matches a string or not. In this article, we will discuss the step-by-step algorithm
    4 min read
    JavaScript - How to Use RegExp in Switch Case Statements?
    To make your JavaScript switch statements more dynamic and flexible, you can use regular expressions (RegExp). Here are the various ways to use RegExp in switch case statement.1. Using test() Method in switchThe test() method can be used to check if a string matches a given regular expression. Let’s
    3 min read
    JavaScript - How to Match Multiple Parts of a String Using RegExp?
    In JavaScript, the regular expression (RegExp) object provides a powerful mechanism to search, match, and manipulate strings. One of the common use cases is matching multiple parts of a string that satisfy a certain pattern. You can easily do this using global (g) and other RegExp features.1. Using
    3 min read
top_of_element && top_of_screen articleRecommendedTop && top_of_screen articleRecommendedBottom)) { if (!isfollowingApiCall) { isfollowingApiCall = true; setTimeout(function(){ if (loginData && loginData.isLoggedIn) { if (loginData.userName !== $('#followAuthor').val()) { is_following(); } else { $('.profileCard-profile-picture').css('background-color', '#E7E7E7'); } } else { $('.follow-btn').removeClass('hideIt'); } }, 3000); } } }); } $(".accordion-header").click(function() { var arrowIcon = $(this).find('.bottom-arrow-icon'); arrowIcon.toggleClass('rotate180'); }); }); window.isReportArticle = false; function report_article(){ if (!loginData || !loginData.isLoggedIn) { const loginModalButton = $('.login-modal-btn') if (loginModalButton.length) { loginModalButton.click(); } return; } if(!window.isReportArticle){ //to add loader $('.report-loader').addClass('spinner'); jQuery('#report_modal_content').load(gfgSiteUrl+'wp-content/themes/iconic-one/report-modal.php', { PRACTICE_API_URL: practiceAPIURL, PRACTICE_URL:practiceURL },function(responseTxt, statusTxt, xhr){ if(statusTxt == "error"){ alert("Error: " + xhr.status + ": " + xhr.statusText); } }); }else{ window.scrollTo({ top: 0, behavior: 'smooth' }); $("#report_modal_content").show(); } } function closeShareModal() { const shareOption = document.querySelector('[data-gfg-action="share-article"]'); shareOption.classList.remove("hover_share_menu"); let shareModal = document.querySelector(".hover__share-modal-container"); shareModal && shareModal.remove(); } function openShareModal() { closeShareModal(); // Remove existing modal if any let shareModal = document.querySelector(".three_dot_dropdown_share"); shareModal.appendChild(Object.assign(document.createElement("div"), { className: "hover__share-modal-container" })); document.querySelector(".hover__share-modal-container").append( Object.assign(document.createElement('div'), { className: "share__modal" }), ); document.querySelector(".share__modal").append(Object.assign(document.createElement('h1'), { className: "share__modal-heading" }, { textContent: "Share to" })); const socialOptions = ["LinkedIn", "WhatsApp","Twitter", "Copy Link"]; socialOptions.forEach((socialOption) => { const socialContainer = Object.assign(document.createElement('div'), { className: "social__container" }); const icon = Object.assign(document.createElement("div"), { className: `share__icon share__${socialOption.split(" ").join("")}-icon` }); const socialText = Object.assign(document.createElement("span"), { className: "share__option-text" }, { textContent: `${socialOption}` }); const shareLink = (socialOption === "Copy Link") ? Object.assign(document.createElement('div'), { role: "button", className: "link-container CopyLink" }) : Object.assign(document.createElement('a'), { className: "link-container" }); if (socialOption === "LinkedIn") { shareLink.setAttribute('href', `https://www.linkedin.com/sharing/share-offsite/?url=${window.location.href}`); shareLink.setAttribute('target', '_blank'); } if (socialOption === "WhatsApp") { shareLink.setAttribute('href', `https://api.whatsapp.com/send?text=${window.location.href}`); shareLink.setAttribute('target', "_blank"); } if (socialOption === "Twitter") { shareLink.setAttribute('href', `https://twitter.com/intent/tweet?url=${window.location.href}`); shareLink.setAttribute('target', "_blank"); } shareLink.append(icon, socialText); socialContainer.append(shareLink); document.querySelector(".share__modal").appendChild(socialContainer); //adding copy url functionality if(socialOption === "Copy Link") { shareLink.addEventListener("click", function() { var tempInput = document.createElement("input"); tempInput.value = window.location.href; document.body.appendChild(tempInput); tempInput.select(); tempInput.setSelectionRange(0, 99999); // For mobile devices document.execCommand('copy'); document.body.removeChild(tempInput); this.querySelector(".share__option-text").textContent = "Copied" }) } }); // document.querySelector(".hover__share-modal-container").addEventListener("mouseover", () => document.querySelector('[data-gfg-action="share-article"]').classList.add("hover_share_menu")); } function toggleLikeElementVisibility(selector, show) { document.querySelector(`.${selector}`).style.display = show ? "block" : "none"; } function closeKebabMenu(){ document.getElementById("myDropdown").classList.toggle("show"); }
geeksforgeeks-footer-logo
Corporate & Communications Address:
A-143, 7th Floor, Sovereign Corporate Tower, Sector- 136, Noida, Uttar Pradesh (201305)
Registered Address:
K 061, Tower K, Gulshan Vivante Apartment, Sector 137, Noida, Gautam Buddh Nagar, Uttar Pradesh, 201305
GFG App on Play Store GFG App on App Store
Advertise with us
  • Company
  • About Us
  • Legal
  • Privacy Policy
  • In Media
  • Contact Us
  • Advertise with us
  • GFG Corporate Solution
  • Placement Training Program
  • Languages
  • Python
  • Java
  • C++
  • PHP
  • GoLang
  • SQL
  • R Language
  • Android Tutorial
  • Tutorials Archive
  • DSA
  • Data Structures
  • Algorithms
  • DSA for Beginners
  • Basic DSA Problems
  • DSA Roadmap
  • Top 100 DSA Interview Problems
  • DSA Roadmap by Sandeep Jain
  • All Cheat Sheets
  • Data Science & ML
  • Data Science With Python
  • Data Science For Beginner
  • Machine Learning
  • ML Maths
  • Data Visualisation
  • Pandas
  • NumPy
  • NLP
  • Deep Learning
  • Web Technologies
  • HTML
  • CSS
  • JavaScript
  • TypeScript
  • ReactJS
  • NextJS
  • Bootstrap
  • Web Design
  • Python Tutorial
  • Python Programming Examples
  • Python Projects
  • Python Tkinter
  • Python Web Scraping
  • OpenCV Tutorial
  • Python Interview Question
  • Django
  • Computer Science
  • Operating Systems
  • Computer Network
  • Database Management System
  • Software Engineering
  • Digital Logic Design
  • Engineering Maths
  • Software Development
  • Software Testing
  • DevOps
  • Git
  • Linux
  • AWS
  • Docker
  • Kubernetes
  • Azure
  • GCP
  • DevOps Roadmap
  • System Design
  • High Level Design
  • Low Level Design
  • UML Diagrams
  • Interview Guide
  • Design Patterns
  • OOAD
  • System Design Bootcamp
  • Interview Questions
  • Inteview Preparation
  • Competitive Programming
  • Top DS or Algo for CP
  • Company-Wise Recruitment Process
  • Company-Wise Preparation
  • Aptitude Preparation
  • Puzzles
  • School Subjects
  • Mathematics
  • Physics
  • Chemistry
  • Biology
  • Social Science
  • English Grammar
  • Commerce
  • World GK
  • GeeksforGeeks Videos
  • DSA
  • Python
  • Java
  • C++
  • Web Development
  • Data Science
  • CS Subjects
@GeeksforGeeks, Sanchhaya Education Private Limited, All rights reserved
We use cookies to ensure you have the best browsing experience on our website. By using our site, you acknowledge that you have read and understood our Cookie Policy & Privacy Policy
Lightbox
Improvement
Suggest Changes
Help us improve. Share your suggestions to enhance the article. Contribute your expertise and make a difference in the GeeksforGeeks portal.
geeksforgeeks-suggest-icon
Create Improvement
Enhance the article with your expertise. Contribute to the GeeksforGeeks community and help create better learning resources for all.
geeksforgeeks-improvement-icon
Suggest Changes
min 4 words, max Words Limit:1000

Thank You!

Your suggestions are valuable to us.

What kind of Experience do you want to share?

Interview Experiences
Admission Experiences
Career Journeys
Work Experiences
Campus Experiences
Competitive Exam Experiences