JavaScript

JavaScript Roadmap

Step by step guide to learn JavaScript in @currentYear@

This page is a visitor-friendly snapshot of how William currently sees this area: what feels strong, what is still being refined, and where the evidence is still partial.

Done

Learning

Target

Skipped

126

Tracked

Status meanings

Done: enough evidence to present this area as a solid strength.

Learning: an area of active development with growing confidence.

Target: relevant and intentional, but still earlier in the journey.

Skipped: not a current priority relative to other areas.

How the estimates are formed

Profile and manual review: 0

Evidence from project experience: 0

Competency mapping alignment: 0

Quiz-backed updates: 0

These signals help estimate progress, but they are still best treated as directional rather than perfectly complete.

Areas currently being strengthened

No standout growth areas are being highlighted here yet.

Introduction to JavaScript

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What is JavaScript

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History of JavaScript

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JavaScript Versions

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How to run JavaScript

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var

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let

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const

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Block

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Function

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Global

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All about Variables

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Variable Scopes

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Variable Naming Rules

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Hoisting

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Variable Declarations

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Data Types

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Object

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typeof operator

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string

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undefined

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number

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bigint

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boolean

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null

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Symbol

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Object Prototype

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Prototypal Inheritance

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Built-in Objects

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Type Casting

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Type Conversion vs Coercion

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Implicit Type Casting

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Explicit Type Casting

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Data Structures

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Keyed Collections

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Indexed Collections

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Map

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Weak Map

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Set

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Weak Set

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Typed Arrays

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Arrays

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Structured Data

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JSON

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Equality Comparisons

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==

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===

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Object.is

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isLooselyEqual

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isStrictlyEqual

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SameValueZero

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Loops and Iterations

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for

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do...while

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while

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for...in loop

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for...of loop

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break / continue

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Control Flow

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Conditional Statements

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Exceptional Handling

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if...else

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Switch

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throw statement

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try/catch/finally

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Error Objects

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Expressions & Operators

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Conditional Operators

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Comma Operators

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Unary Operators

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Assignment Operators

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Comparison Operators

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Arithmetic Operators

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Bitwise Operators

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Logical Operators

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BigInt Operators

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String Operators

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Functions

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Function Parameters

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Arrow Functions

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IIFEs

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arguments object

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Scope & Function Stack

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Built-in Functions

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Default Params

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Rest

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Recursion

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Lexical Scoping

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Closures

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Strict Mode

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Using (this) keyword

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in a method

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in a function

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using it alone

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in event handlers

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in arrow functions

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Function Borrowing

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Explicit Binding

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call

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apply

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bind

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Asynchronous JavaScript

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Callbacks

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Promises

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Event Loop

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setTimeout

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setInterval

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Callback Hell

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async/await

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Working with APIs

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Fetch

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XMLHTTPRequest

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Classes

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Iterators and Generators

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Modules in JavaScript

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ESM

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CommonJS

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Memory Management

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Memory Lifecycle

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DOM APIs

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Garbage Collection

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Using Browser DevTools

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Debugging Issues

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Debugging Memory Leaks

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Debugging Performance

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SameValue

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