Hello World
Printing Multiple Lines
Comments
Basic Arithmetic Output
String Concatenation
Hands-On: Learn TypeScript
Learn TypeScript from scratch by completing practical exercises and writing real TypeScript code.
About This Course
Reading about TypeScript isn’t enough to truly master it. You need to build real projects and tackle real-world challenges. Our immersive 25+ hour TypeScript course is packed with interactive, hands-on exercises in Dometrain’s advanced web Code Editor, guiding you from core TypeScript principles to advanced features like static typing and generics. You don’t need any prior TypeScript experience. Just a basic programming background. At Dometrain, we’re passionate about helping developers learn new programming languages and frameworks from the ground up. That’s why you can access this course for free for 14 days to see how it fits your learning style. Whether you’re new to TypeScript or want to boost your existing skills, this course will ensure you’re up to date with the latest best practices in TypeScript development.
Course Curriculum
24h 49m 33 sections
Declaring Variables with let
Constants with const
Number Type
String Type
Boolean Type
Undefined and Null
BigInt
The typeof Operator
Chapter Capstone - Type Reporter
Arithmetic Operators
Assignment Operators
Comparison Operators
Strict vs Loose Equality
Logical Operators
Ternary Operator
Nullish Coalescing Operator
Logical Assignment Operators
Chapter Capstone - Expression Evaluator
String Length and Character Access
Changing Case
Trimming Whitespace
Searching Strings
Extracting Substrings
Replacing Text
Template Literals
Chapter Capstone - String Processor
If Statements
If-Else Statements
Else-If Chains
Switch Statements
Truthy and Falsy Values
Nested Conditionals
Chapter Capstone - Ticket Pricer
While Loops
For Loops
Do-While Loops
Break and Continue
Nested Loops
Looping Through Strings
Chapter Capstone - Pattern Printer
Function Declarations
Parameters and Return Values
Multiple Parameters
Default Parameters
Early Return Pattern
Scope Basics
Chapter Capstone - Math Toolkit
Function Expressions
Arrow Functions
Arrow Functions with Implicit Return
Rest Parameters
Closures
IIFE Pattern
Chapter Capstone - Function Toolkit
Creating and Accessing Arrays
Modifying Array Elements
Array Length and Iteration
for...of Loop
Push, Pop, Shift, Unshift
Splice and Slice
Searching Arrays
Chapter Capstone - Array Manager
forEach
map
filter
find and findIndex
some and every
reduce
Chaining Array Methods
Chapter Capstone - Data Pipeline
Sorting with Custom Comparators
flat and flatMap
Array.from and Array.of
Spread Operator with Arrays
Array Destructuring
Immutable Array Methods
at() and findLast
Chapter Capstone - Nested Data Processor
Creating Objects
Accessing Properties
Adding and Deleting Properties
Computed Property Names
Shorthand Properties
Checking Property Existence
Chapter Capstone - Contact Card Builder
Object.keys, Object.values, Object.entries
Iterating with for...in
Object Spread and Object.assign
Object Destructuring
Nested Object Destructuring
Optional Chaining
JSON Parse and Stringify
Chapter Capstone - Data Merger
typeof Type Guards
Handling Multiple Types Safely
Array Type Checking
Null and Undefined Guards
Truthiness-Based Narrowing
The in Operator for Property Checking
Chapter Capstone - Safe Data Processor
Tagged Objects
Type Field Dispatching
Result Pattern - Success and Failure
Option Pattern - Some and None
State Machine Pattern
Exhaustive Handling with Default Throws
Chapter Capstone - Shape Calculator with Tags
Frozen Constant Objects
String Constants as Lookup Keys
Reverse Mapping
Bitwise Flag Patterns
Status Code Mappings
Status Code Mappings
Chapter Capstone - Permission System
Creating and Using Maps
Map Iteration
Creating and Using Sets
Set Operations
Converting Between Collections
Map vs Object
Chapter Capstone
Deep Nested Destructuring
Default Values in Destructuring
Rest in Destructuring
Swapping Variables
Function Parameter Destructuring
Chapter Capstone
The this Keyword
this in Arrow vs Regular Functions
call and apply
bind
Constructor Functions
Prototypes and Prototype Chain
Chapter Capstone
Class Declarations
Constructor and Instance Properties
Instance Methods
Getters and Setters
Static Methods and Properties
Private Fields
Chapter Capstone
Extends and Super
Method Overriding
Calling Parent Methods with super
The instanceof Operator
Composition Over Inheritance
Chapter Capstone
Try-Catch Basics
The Error Object
Throwing Custom Errors
Custom Error Classes
Error Cause
The Finally Block
Chapter Capstone
Callbacks
Higher-Order Functions
Recursion
Function Composition
Currying
Memoization
Chapter Capstone
Creating Promises
then and catch
Promise Chaining
Promise.all
Promise.race and Promise.any
Promise.allSettled
Chapter Capstone
Async Functions
Await Keyword
Error Handling with Async/Await
Sequential vs Parallel Execution
Async Utility Functions
Chapter Capstone
The Iterator Protocol
Custom Iterables
Generator Functions
yield and Delegation with yield*
Lazy Evaluation with Generators
Chapter Capstone
Creating and Using Symbols
Well-Known Symbols - Symbol.iterator
Symbol.toPrimitive
WeakMap
WeakSet
WeakRef and FinalizationRegistry
Chapter Capstone
Creating a Basic Proxy
Get and Set Traps
Has and DeleteProperty Traps
The Apply Trap
Reflect API
Chapter Capstone
Creating Patterns and Basic Matching
Character Classes and Quantifiers
Anchors and Boundaries
Groups and Capturing
Lookahead and Lookbehind
Named Groups and matchAll
Chapter Capstone
Pure Functions
Immutability Patterns
Function Composition and Piping
Partial Application
Transducers
Chapter Capstone
Property Descriptors
Object.defineProperty
Object.freeze and Object.seal
Object.preventExtensions
Dynamic Property Access Patterns
Chapter Capstone
Object.groupBy
Built-in Set Methods
Iterator Helpers
structuredClone
Promise.withResolvers
Object.fromEntries Advanced
Chapter Capstone
Type-Safe Result Pattern
Type-Safe Option Pattern
Builder Pattern
Branded Values at Runtime
Assertion Functions
Exhaustive Switch with Never
Chapter Capstone
Meet Your Instructor
Nick Chapsas
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