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