Learn JavaScript: Code & IDE
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About this app
Master JavaScript from scratch with a distraction-free, visual learning experience. Learn JavaScript Pro gives you complete access to structured lessons, an interactive code editor, auto-graded coding challenges, and comprehensive interview preparationโcompletely offline and 100% ad-free.
Whether you are a complete beginner writing your first line of code or an aspiring web developer preparing for technical interviews, this course guides you step-by-step from core syntax to modern ES6+ concepts.
โก LEARN JAVASCRIPT BY DOING
Most coding courses give you walls of text or passive videos. Learn JavaScript Pro uses an active 8-step learning framework:
1. Real-World Analogy: Understand the concept before looking at syntax.
2. Visual Concept Diagram: See how the logic flows in memory.
3. Code Demonstration: Inspect clean, commented code examples.
4. Line-by-Line Breakdown: Know exactly what every keyword does.
5. Interactive Practice: Modify code and predict outputs.
6. Concept Quiz: Reinforce understanding with instant explanations.
7. Coding Challenge: Write your own solution against automated test cases.
8. Lesson Summary: Quick-reference cheat sheet for fast review.
๐ป BUILT-IN JAVASCRIPT CODE EDITOR
Practice coding directly on your mobile device without setting up developer tools or browsers:
โข Instant JavaScript Execution: Write code, tap Run, and view console output immediately.
โข Syntax Highlighting & Auto-Indent: Clean, readable mobile code editing.
โข Error Feedback: Understand runtime errors and debug your scripts quickly.
โข 100% Offline Execution: Run and test JavaScript logic anywhere without an internet connection.
๐ COMPLETE JAVASCRIPT CURRICULUM
Master both fundamental programming principles and modern frontend web development:
โข JavaScript Basics: Variables (let, const, var), data types, operators, and expressions.
โข Control Flow: Conditionals (if/else, switch) and loops (for, while, for...of, forEach).
โข Functions & Scope: Function declarations, arrow functions, closures, scope chain, and callbacks.
โข Arrays & Objects: Array methods (map, filter, reduce), object destructuring, and spread/rest operators.
โข DOM Manipulation: Select elements, handle click/input events, and dynamically update web pages.
โข Modern ES6+ Features: Template literals, destructuring, modules, optional chaining, and nullish coalescing.
โข Asynchronous JavaScript: Event loop, callbacks, Promises, and async/await.
๐ฏ 15 CODING CHALLENGES & AUTO-GRADED TESTS
Put your skills to the test with real coding exercises:
โข Automated Test Cases: Get instant verification when your function passes edge cases.
โข Multi-Level Hints: Get guidance when you are stuck without spoiling the answer.
โข Clean Solution Breakdowns: Compare your approach with optimal JavaScript patterns.
๐ผ 25 JAVASCRIPT INTERVIEW QUESTIONS & ANSWERS
Prepare for junior and mid-level frontend developer interviews:
โข Frequently Asked Questions: Closures, hoisting, prototypes, event delegation, and this binding.
โข Complete Explanations: Clear, technical answers paired with runnable code snippets.
โข Filter & Bookmark: Track mastered questions and save complex topics for last-minute review.
๐ MOTIVATING HABIT-BUILDING FEATURES
โข 18 Achievement Badges: Earn milestone awards from First Code to JavaScript Champion.
โข 5 XP Levels: Level up your developer profile as you complete lessons and challenges.
โข Daily Streaks: Build a consistent daily coding routine without punitive heart/life mechanics.
โข Dark Mode: Comfortable coding during late-night study sessions.
โข 100% Offline Access: Learn on the subway, on flights, or off the grid. All progress saves locally.
No recurring subscriptions. No ads. Just pure, focused JavaScript learning.
Whether you are a complete beginner writing your first line of code or an aspiring web developer preparing for technical interviews, this course guides you step-by-step from core syntax to modern ES6+ concepts.
โก LEARN JAVASCRIPT BY DOING
Most coding courses give you walls of text or passive videos. Learn JavaScript Pro uses an active 8-step learning framework:
1. Real-World Analogy: Understand the concept before looking at syntax.
2. Visual Concept Diagram: See how the logic flows in memory.
3. Code Demonstration: Inspect clean, commented code examples.
4. Line-by-Line Breakdown: Know exactly what every keyword does.
5. Interactive Practice: Modify code and predict outputs.
6. Concept Quiz: Reinforce understanding with instant explanations.
7. Coding Challenge: Write your own solution against automated test cases.
8. Lesson Summary: Quick-reference cheat sheet for fast review.
๐ป BUILT-IN JAVASCRIPT CODE EDITOR
Practice coding directly on your mobile device without setting up developer tools or browsers:
โข Instant JavaScript Execution: Write code, tap Run, and view console output immediately.
โข Syntax Highlighting & Auto-Indent: Clean, readable mobile code editing.
โข Error Feedback: Understand runtime errors and debug your scripts quickly.
โข 100% Offline Execution: Run and test JavaScript logic anywhere without an internet connection.
๐ COMPLETE JAVASCRIPT CURRICULUM
Master both fundamental programming principles and modern frontend web development:
โข JavaScript Basics: Variables (let, const, var), data types, operators, and expressions.
โข Control Flow: Conditionals (if/else, switch) and loops (for, while, for...of, forEach).
โข Functions & Scope: Function declarations, arrow functions, closures, scope chain, and callbacks.
โข Arrays & Objects: Array methods (map, filter, reduce), object destructuring, and spread/rest operators.
โข DOM Manipulation: Select elements, handle click/input events, and dynamically update web pages.
โข Modern ES6+ Features: Template literals, destructuring, modules, optional chaining, and nullish coalescing.
โข Asynchronous JavaScript: Event loop, callbacks, Promises, and async/await.
๐ฏ 15 CODING CHALLENGES & AUTO-GRADED TESTS
Put your skills to the test with real coding exercises:
โข Automated Test Cases: Get instant verification when your function passes edge cases.
โข Multi-Level Hints: Get guidance when you are stuck without spoiling the answer.
โข Clean Solution Breakdowns: Compare your approach with optimal JavaScript patterns.
๐ผ 25 JAVASCRIPT INTERVIEW QUESTIONS & ANSWERS
Prepare for junior and mid-level frontend developer interviews:
โข Frequently Asked Questions: Closures, hoisting, prototypes, event delegation, and this binding.
โข Complete Explanations: Clear, technical answers paired with runnable code snippets.
โข Filter & Bookmark: Track mastered questions and save complex topics for last-minute review.
๐ MOTIVATING HABIT-BUILDING FEATURES
โข 18 Achievement Badges: Earn milestone awards from First Code to JavaScript Champion.
โข 5 XP Levels: Level up your developer profile as you complete lessons and challenges.
โข Daily Streaks: Build a consistent daily coding routine without punitive heart/life mechanics.
โข Dark Mode: Comfortable coding during late-night study sessions.
โข 100% Offline Access: Learn on the subway, on flights, or off the grid. All progress saves locally.
No recurring subscriptions. No ads. Just pure, focused JavaScript learning.
Learn JavaScript offline: visual lessons, code editor, quizzes & interview prep.
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Whatโs new
What's New in Version 1.0.3:
โข Targeted for Android 16 (API Level 36) compatibility and performance
โข Faster code execution and output rendering in the built-in JavaScript editor
โข Smooth animations and instant feedback across all 65 visual lessons
โข Enhanced offline progress tracking and dark mode contrast
โข 100% ad-free lifetime learning experience
โข Targeted for Android 16 (API Level 36) compatibility and performance
โข Faster code execution and output rendering in the built-in JavaScript editor
โข Smooth animations and instant feedback across all 65 visual lessons
โข Enhanced offline progress tracking and dark mode contrast
โข 100% ad-free lifetime learning experience
Everyone
Learn moreApp support
About the developer
Sudarshan Satish Babar
getinfotoyou@gmail.com
Room no 7, Shiv Parvati Chawl, C- wing
Manoramanagar, Thane west
Thane, Maharashtra 400607
India
