Answers to Common JavaScript Questions

Common Challenges While Learning

Is 37 Too Old to Land a Junior Developer Job?

5 Tips for Overcoming the Challenges of Learning JavaScript Online

Progress Seems Very Slow While Learning JavaScript? Here Are Ways to Improve the Situation.

Learning Tips

2 Ways to Practice JavaScript

4 Ways to Make JavaScript More Visual for Beginners

Best Way to Learn JavaScript if You Already Know How to Code

Built a Project Following a Tutorial, Yet Confidence Lags – Here’s Why?

Can You Depend on ChatGPT to Learn JavaScript?

Forgot JavaScript after break? Follow This Structured Approach

Is It a Good Idea to Learn HTML, CSS, and JavaScript Simultaneously?

How to Take Notes While Learning to Code

How to Use ChatGPT for Learning JavaScript

Is JavaScript Good for Learning Data Structures and Algorithms?

Should You Learn JavaScript or Switch to TypeScript?

Is Learning jQuery Still Worthwhile Today?

Struggling with Learning JavaScript? Overcome Frustration with These Helpful Tips

Spending Too Much Time on CSS Instead of Practicing JavaScript? Here Are 5 Tips to Overcome This

Understand JavaScript, But Can’t Write Code? These 7 Steps Will Help You Write Confidently

Why Crash Courses Aren’t the Best Way to Learn JavaScript

Books

What Is the Best Book to Learn JavaScript for Beginners?

Is the Book 'A Smarter Way to Learn JavaScript' by Mark Myers Outdated?

Is 'Eloquent JavaScript' Suitable for Beginners?

Is “JavaScript: The Good Parts” Still Worth Reading Today?

Is “You Don’t Know JS” Good for Beginners?

Running JavaScript Programs

3 Ways to Quickly Try Out Your JavaScript Code

Variables, Data Types and Other Basics

2 Use Cases for Symbol Data Type in Real-Life

3 ways to convert numbers to strings with vanilla JavaScript

3 Ways to Convert Strings to Numbers in Vanilla JavaScript

Are Semicolons Required in JavaScript?

Declaring Multiple Variables in a Single Statement in JavaScript

Understanding Infinity, Negative Infinity, and NaN in JavaScript

Inline vs External JavaScript: Is There a Difference?

Math Operators in JavaScript

Organizing JavaScript Code: Single File vs Multiple Files

Primitive Data Types in JavaScript

Statements vs Expressions in JavaScript

Techniques for Modifying the Start and End of Strings in JavaScript

Use Separators to Make Your Number Literals More Readable

Variables in JavaScript

What is Hard Coding and Why We Should Avoid It

Why JavaScript's == Doesn't Always Behave as You Expect

How To Write Comments in JavaScript

Functions

Invoke Function with Default Value for First Argument and Custom Value for Second Argument in JavaScript

JavaScript Closures: What They Are and Why You Need Them

Function Expressions and Anonymous Functions in JavaScript: What are They, When to Use Them, Arrow Functions, and IIFE

JavaScript Named Functions: Declaring, Calling, and Getting Values from Functions Explained

How Do You Know If There's a Built-In Method Instead of Writing Logic Yourself?

Real-Life Use Cases for call, apply, and bind

Reasons for Creating a Function Without the Name and Assigning It to a Constant Variable

When to Use Anonymous Functions in JavaScript

Why Is the eval() Function Dangerous?

Why is eval risky, but not the browser console?

Why Does a Function Execute Immediately with Parentheses, Whereas Without Parentheses, It Waits Within setTimeout()?

Scope

Execution Contexts and Hoisting in JavaScript

JavaScript Scopes: Exploring Local, Function, Block, Global, and Nested Scopes

Do We No Longer Use 'var' in JavaScript?

var, let, and const in JavaScript: Scope, Hoisting, Redefinition, and Reassignment

Why Variables are Hoisted as Undefined and Function Declarations Hoisted with Their Values in JavaScript?

Behind The Scenes

Hoisting in JavaScript: It's Not Just Moving Code to the Top

How JavaScript Executes Your Code

Loops

Choosing the Right Loop in JavaScript

Why Can You Have Multiple Const Declarations with the Same Name Inside a Loop?

Practical Uses of Loops in Front-End Development

Understanding Why a Loop Might Freeze Your Browser

Arrays

Can We Assign a String as an Index for Array Elements in JavaScript?

Exploring Arrays in JavaScript: Creating, Accessing, and Changing Values

Understanding the Purpose of Array.of in JavaScript

Why Use Destructuring Instead Of Indexing For An Array in JavaScript

Sorting

How does Array.sort((a, b) => a - b) in JavaScript work?

What's the Preferred Method for Sorting in JavaScript: toSorted() or sort()?

Why does JavaScript's .sort() Function Compare Digit by Digit Instead of Whole Numbers?

DOM

Accessing Dynamically Created DOM Elements

Auto File Download on Page Navigation in JavaScript

What's the Difference Between document.querySelector() and document.getElementById()?

Displaying Specific Output from an Input Field Using JavaScript

Why Do Inline Event Functions Use Quotations and Parentheses, While Event Handler Properties Only Require the Function Name?

Safe Alternatives to innerHTML

Is It a Security Risk to Use innerHTML Even If You Set the Value Yourself?

Waiting for Multiple Events Before Executing a Function in JavaScript

Why Is Using innerHTML a Bad Idea?

Objects

5 Ways to Create Objects in JavaScript

Creating a JSON String in JavaScript

Creation of Large Number of Objects from an Array in JavaScript

Difference Between __proto__ and .prototype Properties in JavaScript

How Arrays and Functions Are Also Objects in JavaScript

Objects in JavaScript: Creating, Accessing and Updating Values

JavaScript Prototypal Inheritance: Object.create() vs Direct Assignment

this Keyword

Call, Apply, and Bind Methods in JavaScript

JavaScript's 'this' Keyword: Understand How It Works Under Different Scenarios

Why Use 'this' Instead of the Object Name to Reference the Object's Properties in JavaScript?

Higher Order Functions

Why Do You Need Higher-Order Functions?

Why Use .map() When a For Loop Is Just as Good?

Asynchronous Code

2 Use Cases of the 'finally' Keyword in JavaScript

Are Promises Still Used with the Introduction of async/await?

Async Network Requests: For Loop vs. .map() + Promise.all()?

Callbacks Still Not Making Sense? Let’s Simplify Them!

What is the difference between callback, promises, and async/await?

Difference Between Higher-Order Functions and Callbacks

Do Async Functions Begin Synchronously?

Executing Multiple Asynchronous Calls Simultaneously with '.then()' Triggered Only After All Complete

Explaining Constructing a promise in JavaScript as if You Were a Kid

Explaining Promises in JavaScript as if You Were a Kid

ForEach Causing Issues When Used with Async Callbacks? Here's Why

How to Read Nested Callback Code in JavaScript

If Javascript Is Single Threaded, How Is It Asynchronous?

Impact of Async/Await vs .then on Function Execution

Promises Aren't Just for Fetching Data: Learn Other Uses

Why Does the sleep() Function in JavaScript Use a Promise?

Why Is JavaScript Single-Threaded?

Why JavaScript Has Both Promises and Async/Await for Async Tasks

Why JavaScript Needs Asynchronous Programming

Why setTimeout Doesn't Work in Loops: Results Coming Together After Timeout

API Calls

Best Way to Communicate with an API: Fetch or Axios?

What Is the Difference Between the Fetch API and a REST API?

Can You Securely Store API Keys in Browsers or Frontend Apps?

Understanding the JavaScript Fetch API with Examples

How to Use Fetch API in Old Browsers and Node.js

Where Is the Data in JavaScript Fetch API?

Why Is There No Timeout Parameter for Fetch?

Why Do People Still Use the Axios Instead of Fetch?

Why Use then()/await Two Times to Get the Data in Fetch API?

Data Manupulation

Deep vs Shallow Copy in JavaScript

How Can You Determine if Something Is a Deep Copy in JavaScript?

Does JavaScript Support Dictionaries?

Storing Data

4 Ways to Save Data Locally Without Setting Up a Server

Date & Time

How to Get Date and Time from Date Object in JavaScript

Classes

When to Use Classes in JavaScript

Modules/Bundlers

Bundling a Basic JavaScript Library: A Step-by-Step Guide

Difference Between Named and Default Imports: Which One Should You Use?

How to Export and Import Multiple Functions in Vanilla JavaScript for the Browser?

Understanding npm install: How It Works and Where Packages Are Installed

Libraries/Framework

Deciding Whether to Include Libraries in Your Codebase: Here's My Decision-Making Process

How Much JavaScript Do You Need to Know Before Learning React?

Top JavaScript Packages and Libraries That You Should Know in 2024

Main Difference Between a Library and a Framework

When to Use a JavaScript Framework?

Debugging

Unable to find mistakes in your code? Here are 6 tips for effective debugging

Documentation

7 Simple Tips to Get better at Reading Documentation

Projects

7 Tips to Enhance Structure and Readability in Your JavaScript Projects

Is It Beneficial to Redo Projects for a Better Grasp of Each Concept?

Everyone Gets Stuck: How to Use Help and Improve Your Coding Skills

3 Impactful JavaScript Projects for Portfolio and Resume to Land Your First Job

8 Simple Tips to Come up with JavaScript Project Ideas for Beginners

Starting JavaScript Projects: A Guide for Beginners

What kind of projects to build? Here are 4 tips for selecting a project

Landing A Job

12 Tips to Write an Effective Web Developer Resume

4 Tips to Keep Improving Skills After Getting a Developer Job

8 Key Qualities Employers Look for During Job Interviews

Git Workflow for Working in Teams

How Long Does It Really Take to Get a Job as a Self-Taught Developer?

How Much JavaScript Should You Know to Get a Job

JS Interviews: Data Structures & Algorithms Implementation Expectations?

Stressed About Senior Developer Leaving the Job? Here's What You Can Do

How Do I Know I'm Ready to Apply for My First Web Development Job?

Advice for Landing First Job for Entry-Level JavaScript Developers

Do You Need to Know Data Structures and Algorithms (DSA) to Land a Web Development Job?

Do You Need to Know Data Structures and Algorithms (DSA) as a Web Developer?

Want to Increase Your Chances of Landing Interviews? Instead Of Simply Applying, Consider Doing This Instead

What to Expect in Non-DSA Interviews as a Web Developer

Write Clean Code

How to Name Things in JavaScript

JSDoc vs. Regular Comments

Make Your JavaScript Scripts Portable with Shebang

The Right Way to Comment Your Code in JavaScript

Why I Switched to Using str.startswith