What is a pure function?
Pure functions are a very important concept to know, especially if you're interested in functional programming.
JavaScript Interview Questions
Preparing for a job interview requires studying to refresh your knowledge and skills. This collection of JavaScript interview questions is designed to cover some commonly-asked interview questions, using concise answers and simple examples.
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JavaScript · What is recursion and when is it useful?
Recursion is a very important programming concept all developers should be familiar with.
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JavaScript · What does 'use strict' do and what are some of the key benefits to using it?
JavaScript's strict mode can make your code faster, cleaner and more secure.
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HTML · What is the difference between async and defer in script loading?
Understanding how to correctly load your JavaScript files can significantly improve your web application's performance.
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JavaScript · What are JavaScript closures?
Learn and understand closures, a core concept in JavaScript programming, and level up your code.
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JavaScript · What is an IIFE in JavaScript?
An Immediately Invoked Function Expression (IIFE) is a JavaScript trick that trips up many developers. Here's what you need to know.
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JavaScript · What is the Event Loop in JavaScript?
The Event Loop is a source of confusion for many developers, but it's a fundamental piece of the JavaScript engine.
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JavaScript · What is the difference between prefix and postfix operators?
While both the prefix and postfix operators increment a value, the resulting value of the expression is very different.
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JavaScript · What is CORS?
CORS (Cross-Origin Resource Sharing) trips up many developers, but it's pretty easy to wrap your head around.