JavaScript Essentials
BeginnerThe language of the web. From DOM manipulation to modern ES6+, async/await, and Node.js fundamentals.
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❓ 250 questions 💡 20 tips 🎬 10 videos ⏱ ~30h
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Certification Exam
JavaScript Essentials
❓ 40
Questions
⏱ 60m
Time Limit
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Certification Exam
JavaScript Essentials
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40 Questions
All difficulty levels
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60 Minutes
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70% to Pass
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Tips
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Functional Beginner
Arrow Functions & `this`
Why arrow functions don't have their own `this`
Functional Beginner
Destructuring Assignment
Unpack arrays and objects in one clean line
Functional Beginner
Spread vs Rest Operators
Same syntax, opposite purposes
Functional Beginner
Optional Chaining & Nullish Coalescing
Safely access nested properties without crashes