JavaScript

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JavaScript 1 🧬 JavaScript Introduction JavaScript 2 🧬 How to add JavaScript JavaScript 3 🧬 Comments JavaScript 4 🧬 Variables Javascript 5 🧬 variable hoisting and var vs let JavaScript 6 🧬 escape characters and template literals JavaScript 7 🧬 Automatic type conversion and typeof operator JavaScript 8 🧬 objects JavaScript 9 🧬 Explicit Type Conversion JavaScript 10 🧬 Functions JavaScript 11 🧬 Control flow and Conditional execution JavaScript 12 🧬 switch statement JavaScript 13 🧬 loops part 1 JavaScript 14 🧬 loops part 2 JavaScript 15 🧬 Arrow functions JavaScript 16 🧬 Call stack JavaScript 17 🧬 closure JavaScript 18 🧬 what is recursion Javascript 19 🧬 pure functions JavaScript 20 🧬 Arrays JavaScript 21 🧬 Mutability JavaScript 22 🧬 string methods JavaScript 23 🧬 rest parameters JavaScript 24 🧬 Destructuring JavaScript 25 🧬 Math Object JavaScript 26 🧬 JSON JavaScript 27 🧬 Higher-order functions JavaScript 28 🧬 Encapsulation JavaScript 29 🧬 Prototype JavaScript 30 🧬 Classes JavaScript 31 🧬 Class notation JavaScript 32 🧬 Class getters and setters JavaScript 33 🧬 Class Inheritance JavaScript 34 🧬 Class Method Override JavaScript 35 🧬 Polymorphism JavaScript 36 🧬 Iterator Interface JavaScript 37 🧬 Maps JavaScript 38 🧬 instanceof operator JavaScript 39 🧬 Error handling — try/catch/finally/throw JavaScript 40 🧬 The this keyword — call/apply/bind JavaScript 41 🧬 Spread operator JavaScript 42 🧬 Promises JavaScript 43 🧬 async/await JavaScript 44 🧬 ES Modules — import/export JavaScript 45 🧬 Array methods in depth JavaScript 46 🧬 Object methods in depth JavaScript 47 🧬 Sets and WeakSets JavaScript 48 🧬 Date and time JavaScript 49 🧬 Regular expressions JavaScript 50 🧬 Numbers — Number, parseInt, parseFloat JavaScript 51 🧬 BigInt JavaScript 52 🧬 Symbols JavaScript 53 🧬 Generators — function*, yield JavaScript 54 🧬 Event loop

Programming | JavaScript

JavaScript 51 🧬 BigInt
ByKandZ September 17, 2026September 17, 2026

BigInt is a numeric type for arbitrary-precision integers. Where regular JavaScript numbers lose precision past 2^53 – 1, BigInt keeps exact values no matter how large. It’s the tool for cryptography, large IDs, precise timestamps in nanoseconds, and anywhere exact integer math matters. Key point: BigInt and Number are different types. You can’t mix them…

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Programming | JavaScript

JavaScript 52 🧬 Symbols
ByKandZ September 17, 2026September 17, 2026

A Symbol is a unique, immutable primitive value used as an object property key. Every Symbol is guaranteed to be different from every other Symbol — even if they have the same description. Symbols let you add properties to objects without any risk of collision, and they power many of JavaScript’s built-in protocols. Key point:…

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Programming | JavaScript

JavaScript 53 🧬 Generators — function*, yield
ByKandZ September 17, 2026September 17, 2026

A generator is a function that can pause and resume. Where a regular function runs to completion, a generator produces a sequence of values, one at a time, on demand. The function* syntax and yield keyword make this possible. Key point: Generators return an iterator. You pull values out one at a time with .next(),…

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Programming | JavaScript

JavaScript 54 🧬 Event loop
ByKandZ September 17, 2026September 17, 2026

JavaScript is single-threaded — it runs one piece of code at a time. Yet it can handle clicks, timers, network requests, and animations without freezing. The event loop is how. It’s the mechanism that lets JavaScript juggle many tasks on a single thread. Key point: JavaScript has one call stack, one heap, and a task…

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