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JavaScript in 30 words

A refresher on JavaScript concepts in less than 30 words

Concepts35

Fundamentals15

Variables
Functions
Function Expressions
Operators
Comparisons
Conditional (Ternary) Operator
Logical Operators
For Loops
While Loops
Switch Statements
Arrow Functions
Array Methods
String Methods
Classes
Scope

Advanced20

The call stack
Event loop
IIFEs
Nested functions
Recursion
Memoization
Closures
Hoisting
Currying
Value vs reference
Asynchronous JavaScript
Promises
Async and await
Global objects
this keyword
call()
apply()
bind()
Prototypal inheritance
Polymorphism

JavaScript in 30 words

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Find the explanation you need in the concept library.

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Understand the concept. Write the code.

Once you’ve mastered these concepts, take the next step: implement them in Practice Pad, a JavaScript interview practice app for Mac.

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