If you’re diving into the world of JavaScript or prepping for your next dev interview, having a go-to cheatsheet can save you tons of time. Whether you're a beginner or brushing up after a break, this one-stop reference from The Campus Coders is designed to cover the most essential JavaScript concepts — fast, clear, and practical.

Let’s jump right in. 👇

Why Use a JavaScript Cheatsheet?

In the real world, devs don’t memorize everything — they build fast by recalling patterns. A cheatsheet gives you:

  • A quick refresher when you're stuck
  • Cleaner, copy-paste-ready syntax
  • Real-world code snippets and use-cases
  • Less time Googling, more time building

What This Cheatsheet Covers

Here’s what you’ll find inside our JavaScript Cheatsheet:

1. Variables & Data Types

  • let, const, var → When to use what
  • Primitive Types: string, number, boolean, null, undefined, symbol, bigint
  • Reference Types: Object, Array, Function

2. Loops & Conditionals

  • if, else, switch
  • for, while, do-while, for...of, for...in
  • Ternary Operators for cleaner logic

3. Functions

  • Function declaration vs expression
  • Arrow functions & this context
  • Callback, Higher-order functions

4. Objects & Arrays

  • Object destructuring
  • Spread and Rest operators
  • Array methods: map, filter, reduce, find, some, every

5. Asynchronous JS

  • setTimeout, setInterval
  • Promises → .then(), .catch()
  • async/await pattern
  • Fetch API & error handling

6. Scope, Hoisting, Closures

  • Lexical scope
  • Function and block scoping
  • Closure examples you’ll actually use

7. DOM Manipulation

  • document.querySelector, getElementById
  • Event listeners: click, submit, keydown
  • Changing styles, text, and attributes

8. ES6+ Features

  • Template literals
  • Modules (import, export)
  • Default parameters
  • Optional chaining ?.

9. Debugging & Console

  • console.log(), warn(), error(), table()
  • typeof, instanceof, JSON.stringify()

10. Type Conversion

  • Implicit vs explicit conversion
  • Truthy & Falsy values
  • Unary + operator, parseInt, parseFloat, Number()

Pro Tip: How to Use This Cheatsheet Effectively

  • Bookmark it in your dev browser
  • Practice by re-typing snippets (not just copy-paste)
  • Pair each section with mini projects
  • Use it as a daily warm-up when learning JavaScript

What Makes The Campus Coders Cheatsheet Different?

Unlike generic cheatsheets, we built this with:

  • Real-world devs in mind (not just theory)
  • Hinglish-style tooltips for added relatability
  • Interactive code blocks (coming soon!)
  • Printable PDF version so you can learn offline too

Ready to Code Smarter?

This isn’t just a cheatsheet — it’s your JavaScript companion for coding faster, learning deeper, and preparing better for projects and interviews.

👉 Explore the Cheatsheet Now

Make sure to follow us on all platforms @thecampuscoders for daily JavaScript tips, tutorials, and bite-sized learning!