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JavaScript Exercises

Master JavaScript syntax through 335 interactive fill-in-the-blank challenges. From variables to advanced logic, practice until it's second nature.

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Exercise Categories

algorithms

15 Exercises

Interactive practice for algorithms in JavaScript.

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arrays

15 Exercises

Interactive practice for arrays in JavaScript.

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async

10 Exercises

Interactive practice for async in JavaScript.

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big o

7 Exercises

Interactive practice for big o in JavaScript.

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classes

15 Exercises

Interactive practice for classes in JavaScript.

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closures

5 Exercises

Interactive practice for closures in JavaScript.

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conditionals

15 Exercises

Interactive practice for conditionals in JavaScript.

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dates

15 Exercises

Interactive practice for dates in JavaScript.

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dom

15 Exercises

Interactive practice for dom in JavaScript.

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error handling

10 Exercises

Interactive practice for error handling in JavaScript.

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errors

15 Exercises

Interactive practice for errors in JavaScript.

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es6 features

15 Exercises

Interactive practice for es6 features in JavaScript.

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events

15 Exercises

Interactive practice for events in JavaScript.

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functions

12 Exercises

Interactive practice for functions in JavaScript.

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json

5 Exercises

Interactive practice for json in JavaScript.

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linked lists

7 Exercises

Interactive practice for linked lists in JavaScript.

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loops

15 Exercises

Interactive practice for loops in JavaScript.

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math

15 Exercises

Interactive practice for math in JavaScript.

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modules

10 Exercises

Interactive practice for modules in JavaScript.

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objects

15 Exercises

Interactive practice for objects in JavaScript.

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promises

15 Exercises

Interactive practice for promises in JavaScript.

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recursion

6 Exercises

Interactive practice for recursion in JavaScript.

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regex

15 Exercises

Interactive practice for regex in JavaScript.

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stacks queues

8 Exercises

Interactive practice for stacks queues in JavaScript.

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strings

10 Exercises

Interactive practice for strings in JavaScript.

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variables

10 Exercises

Interactive practice for variables in JavaScript.

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Why use Learn2Code for
JavaScript practice?

Active Recall

Don't just watch videos. Thinking about the missing code piece activates your brain much more effectively than passive learning.

Instant Feedback

Every choice you make gives you detailed, personalized feedback. You'll understand why a distractor is wrong immediately.

Zero Friction

No environment to set up. No accounts to create. Just pick a topic and start typing code.

// Example JavaScript Exercise
function calculateTotal(price, tax) {
  const total = price * (1 + tax);
  return total;
}
sum
total
result

Frequently Asked Questions

Are these JavaScript exercises free?
Yes, all JavaScript exercises on Learn2Code are 100% free and require no sign-up. We believe the best way to learn is by doing, so we've made our interactive practice accessible to everyone.
What topics are covered in the JavaScript practice?
Our JavaScript curriculum covers everything from basic variables and functions to advanced concepts like algorithms. Each category features multiple exercises ranging from beginner to advanced difficulty.
How does the fill-in-the-blank format help?
Fill-in-the-blank exercises force you to read and understand existing code context before providing the missing piece. This builds "code fluency"—the ability to recognize and write syntax patterns quickly and accurately, which is essential for professional development.

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