✅ 📌 Essential JavaScript Cheatsheet 💻🧠

⬇️ Quick JS reference for beginners:

1) let / const / var – Declare variables
2) typeof – Check variable type
3) if / else / else if – Conditional logic
4) for / while / do-while – Loops
5) function() – Declare a function
6) Arrow Functions (=>) – Shorter function syntax
7) Array Methods:
• push(), pop() – Add/remove from end
• shift(), unshift() – Add/remove from start
• map(), filter(), reduce() – Looping & data transformation

8) String Methods:
• length, toUpperCase(), includes(), split()

9) Objects – Key-value data structures
const user = { name: "John", age: 25 };
10) JSON – Convert between objects & strings
JSON.stringify(obj), JSON.parse(string)
11) DOM Manipulation
document.getElementById("id").innerText = "Hello";
12) Events – Handle user actions
button.addEventListener("click", function() {...});
13) setTimeout / setInterval – Run code later or repeatedly
14) Promises & async/await – Handle asynchronous code
15) Fetch API – Get data from APIs
fetch(url).then(res => res.json()).then(data => ...)

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