TypeScript Complete Curriculum & Syllabus
Advance step-by-step through 10 structured progressive levels, taking learners from foundational core concepts to expert mastery. Explore the full syllabus below before enrolling.
Unlock All 10 Levels for TypeScript
Get complete access to all modules, practical lessons, interactive quizzes, and advanced tracking tools designed to accelerate skill mastery.
Everything You Need to Succeed in TypeScript
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Comprehensive 10-Level Syllabus
Review the exact modules and learning milestones included inside every level of our TypeScript program.
Typed Foundations: First Steps in TypeScript
Your first steps in TypeScript: understand what the language is, install and compile with tsc, configure tsconfig.json, then master variables, the big three primitive types, arrays, tuples, objects, functions, unions and narrowing. Ends with a 50-question full practice test.
Included Modules (6)
What TypeScript is, why it exists, installing tsc, how compilation and tsconfig.json work,...
Declare values the modern way (const/let), master string, number and boolean, understand i...
Type collections and shapes: arrays, tuples, object types, optional and readonly propertie...
Functions done right: typed parameters and returns, void/undefined/never, optional, defaul...
The flexibility toolkit: union types, literal types and aliases, typeof narrowing, handlin...
A 50-question exam covering every Level 1 module: tooling, variables and primitives, array...
Core Type System: Interfaces, Aliases & Guards
Level 2 turns you fluent in the everyday type system: type aliases, structural typing and excess property checks, index signatures, readonly in depth, interfaces with extends and declaration merging, literal types and widening, discriminated unions, exhaustiveness with never, user-defined type guards, enums, Record dictionaries and the satisfies operator. Ends with a 50-question full practice test.
Included Modules (6)
Name any type with the 'type' keyword, then master the rules that govern object types: exc...
Declare named contracts with interface, grow them with extends, reopen them with declarati...
Turn fixed values into types: literal widening rules, unions of literals for option sets,...
Go beyond basic typeof checks: truthiness and equality narrowing, the in operator and inst...
The tools that finish the core system: numeric and string enums, const enums and their lit...
A 50-question exam spanning all five Level 2 modules: aliases and structural typing, inter...
Functions & Generics: Reusable Type Power
Level 3 turns functions and generics into everyday tools: function type expressions and contextual typing, optional, default and rest parameters (including tuple rests), call signatures and this-aware callbacks, void and never returns, function overloads with precise resolution rules, functions returning functions, generic functions with inference and explicit type arguments, constraints with extends, keyof and indexed access types, multiple type parameters with defaults, generic interfaces and aliases, call and constructor signatures, the built-in generic collections (Array, ReadonlyArray, Map, Set, Promise), custom utility types, and practical generic patterns - typed data structures, factories and memoization, Result and Paginated containers, advanced constraint patterns and best practices. Ends with a 50-question full practice test.
Included Modules (6)
Describe functions from the outside in: function type expressions, contextual typing, opti...
Master what functions give back: return annotations, void's discard rule, never-returning...
Declare type parameters, steer inference, constrain with extends, combine keyof with index...
Parameterise interfaces and aliases, type callables and constructors, and put the built-in...
Apply generics where they shine: typed data structures, factories and memoization, Result...
A 50-question exam spanning all five Level 3 modules: function signatures and parameters,...
Advanced Types: Intersections, Mappings & Conditionals
Level 4 unlocks the type system's transformation layer: intersection types from the & operator through primitive collapses to never, property conflicts and optionality rules, and composition patterns like WithId and Tagged; mapped types from [K in U] fundamentals through homomorphic keyof T mapping, the modifier operators (+readonly, -?, +?, -?), key remapping with the as clause, and practical flags, patches and handler maps; conditional types with T extends U, distributive evaluation over unions, the infer keyword, nested conditionals with distribution control, and the filtering recipes behind Exclude and Extract; a deep dive into the built-in utilities (Partial, Required, Readonly, Pick, Omit, Exclude, Extract, NonNullable, Parameters, ReturnType, Awaited) and their combination into real-world API types like CreateInput and UpdateInput; then the advanced toolkit: template literal types with string manipulators, rebuilding the utilities from scratch, type-level event maps and state transition tables, pitfalls with any and accidental distribution, and the discipline of when NOT to go type-level. Ends with a 50-question full practice test.
Included Modules (6)
Combine contracts with &: intersection fundamentals, primitive intersections collapsing to...
Transform whole shapes at once: [K in U] fundamentals, homomorphic mapping over keyof T th...
Bring logic to the type level: T extends U ? X : Y conditionals, distributive evaluation o...
Master the standard library of types: shape-changers Partial, Required and Readonly; key s...
Put the toolkit to work: template literal types with Uppercase, Lowercase, Capitalize and...
Fifty fresh questions spanning the whole level: intersection types and their conflicts, ma...
Object-Oriented TypeScript: Classes & Design Patterns
Level 5 turns to object-oriented TypeScript: class declarations that introduce both a type and a value, instance fields with initializer ordering and definite assignment, constructors with overloads, parameter properties and readonly state, getters and setters for computed and validated properties, and static members on the class side; the inheritance ladder with extends, super delegation and initialization order, the public/private/protected access modifiers plus runtime-enforced ECMAScript #private fields, method overriding with the override keyword and noImplicitOverride, and Liskov-safe hierarchy design; abstract classes and abstract members, interfaces fulfilled with implements, choosing between abstract classes and interfaces, and classes as first-class values with constructor signatures and instanceof narrowing; polymorphism and dynamic dispatch, polymorphic this types for fluent builders, mixin composition, composition-over-inheritance design, and encapsulation with information hiding; then the classic design patterns made type-safe: Factory Method and Builder, Singleton and dependency injection, Strategy and Command, Observer with typed event emitters, and the wrapper family of Adapter, Decorator and Facade. Ends with a 50-question full practice test.
Included Modules (6)
Start writing classes with confidence: what a class declaration creates (a type AND a valu...
Grow type-safe hierarchies: extends mechanics and single inheritance, super delegation wit...
Design contracts and class-level state: static members and static blocks on the class side...
Advanced object design: polymorphism and dynamic dispatch across subtype collections, poly...
The classic GoF patterns rebuilt with TypeScript types: Factory Method and Builder for cre...
Fifty fresh questions spanning the whole level: class anatomy and initialization, inherita...
Modules, Architecture & Declaration Files
Level 6 teaches how real TypeScript projects are structured and how the language talks to the wider JavaScript ecosystem: the module system where any import or export turns a script into a file-scoped module, named and default exports and their trade-offs, type-only imports and exports that vanish at compile time, re-exports and barrel files for public API design; module resolution with relative and non-relative specifiers, CommonJS interop through esModuleInterop and allowSyntheticDefaultImports, the legacy export = and import x = require() forms, dynamic import() for lazy loading, and path mapping with baseUrl and paths; namespaces as the legacy grouping tool and when they still make sense, circular dependencies with their runtime symptoms and cures, layered architecture and dependency direction, and sensible ways to organize types across folders; declaration files from the ground up - what .d.ts files are, the declare keyword for variables, functions and classes, ambient module declarations and wildcards, triple-slash directives and the lib.d.ts family, and the DefinitelyTyped @types ecosystem; finally declaration merging beyond interfaces for classes, enums and namespaces, module augmentation for extending packages you do not own, safe global augmentation of Window and built-in prototypes, writing a complete declaration file for a small library, and package entry points from the types field to the exports map. Ends with a 50-question full practice test.
Included Modules (6)
Master the boundary between scripts and modules: how a single import or export changes the...
Follow a specifier from source to file: how TypeScript resolves relative and bare imports,...
Zoom out from single files to project structure: namespaces as the legacy grouping tool an...
Cross the border into the JavaScript ecosystem: what .d.ts files are and why they exist, t...
The advanced interop toolkit: declaration merging beyond interfaces for classes, enums and...
Fifty fresh questions spanning the whole level: the module system and its export/import fo...
Async TypeScript: Promises, APIs & Runtime Data
Level 7 conquers asynchronous TypeScript end to end: why async exists - the single thread, the event loop, callbacks and microtasks; creating and typing promises with the Promise constructor and executor signatures; the anatomy of Promise<T> through then, catch, finally and PromiseLike; how async functions infer their return types and how await unwraps values; composing work with Promise.all tuple overloads, the PromiseSettledResult union from allSettled, and the first-settled vs first-fulfilled semantics of race and any; refactoring then-chains to async/await and the rule that catch gives you unknown; the iteration protocol with Iterable, Iterator, Generator and its async cousins AsyncIterable, AsyncGenerator and for await...of; fetching real data with fetch and the Response type, taming the any returned by json() and JSON.parse through parse-don't-validate, success/error discriminated unions, pagination envelopes and DTO mappers; then production patterns: sequential vs concurrent loops with concurrency limits, generic retry/timeout/debounce wrappers, AbortController cancellation, loading/success/error state machines and testing async code. Ends with a 50-question full practice test.
Included Modules (6)
Start asynchronous TypeScript from first principles: the single-threaded event loop and wh...
Chain and combine asynchronous work safely: Promise.all's tuple overloads and short-circui...
Master the protocols behind sequential data: the Iterable and Iterator interfaces with Ite...
Bring real network data under the type system: fetch and the Response type - ok, status, H...
Production-grade asynchronous design: sequential loops vs concurrent Promise.all and bound...
A 50-question certification check across all of Level 7: the event loop and promise mechan...
TypeScript in the Browser: DOM, Events & UI Patterns
Level 8 brings TypeScript into the browser: how lib.dom.d.ts models the document as a typed object graph from EventTarget down through Node and Element to HTMLElement and concrete tag interfaces like HTMLInputElement and HTMLCanvasElement; selecting elements and mastering the return types of getElementById, querySelector, querySelectorAll and getElementsByClassName plus the querySelector<T> assertion generic; surviving strictNullChecks where every lookup can miss, using guards, optional chaining and non-null assertions responsibly; narrowing with instanceof and custom type predicates; reading and writing textContent, innerHTML, value, dataset and style safely; typing events end to end through the addEventListener overload maps and the Event, UIEvent, MouseEvent, KeyboardEvent, InputEvent and SubmitEvent hierarchy; target vs currentTarget, event delegation, CustomEvent<T> payloads and listener cleanup with removeEventListener, once and AbortSignal; handling forms with HTMLFormElement, FormData, input value/checked patterns, select elements, the constraint validation API and a typed form state machine; persisting typed state through the Storage interface, JSON.parse boundaries with parse-and-validate wrappers, browser timer typing, URL and URLSearchParams; and modern UI patterns: IntersectionObserver, ResizeObserver, MutationObserver, requestAnimationFrame loops, WebSocket message unions and drag & drop with DataTransfer. Ends with a 50-question full practice test.
Included Modules (6)
Meet the typed browser: how lib.dom.d.ts describes the document as an interface tree from...
Type events end to end: how addEventListener's overload maps infer concrete event classes...
Build fully typed form flows: the HTMLFormElement interface and the SubmitEvent with its s...
Persist and schedule with type discipline: the Storage interface behind localStorage and s...
Modern UI machinery with precise types: IntersectionObserver for visibility and lazy loadi...
A 50-question simulated exam across all Level 8 material: DOM typing and selection return...
Compiler Mastery: Config, Decorators & Performance
Level 9 makes you the master of the compiler itself. It dissects tsconfig.json flag by flag: how tsc discovers inputs through files, include and exclude; what target and lib actually select; module and moduleResolution pairings across commonjs, esnext, node16, nodenext and bundler; interop with esModuleInterop; and emit control with outDir, rootDir, declaration, declarationMap and sourceMap. It then walks the entire strictness family flag by flag - strict, strictNullChecks, exactOptionalPropertyTypes, noImplicitAny, noImplicitThis, useUnknownInCatchVariables, strictFunctionTypes, strictBindCallApply, strictPropertyInitialization and noUncheckedIndexedAccess - plus hygiene flags like noUnusedLocals, noImplicitOverride and noFallthroughCasesInSwitch. Decorators get a full treatment: experimentalDecorators versus the standard TC39 decorators, class, property, method, accessor and parameter decorators, decorator factories, evaluation and application order, and emitDecoratorMetadata with Reflect.metadata design:* types for dependency injection. On the performance side: incremental builds and tsbuildinfo, composite projects and project references with tsc -b, skipLibCheck, isolatedModules and import type, transpile-only toolchains with esbuild, SWC and ts-node, and profiling slow compiles with --diagnostics, --extendedDiagnostics and --generateTrace. Finally, real-world configuration: extends chains and shared base configs, baseUrl and paths aliases, declaration emit for libraries, JSX and typeRoots setup, and gradual JavaScript-to-TypeScript migration with allowJs and checkJs. Ends with a 50-question full practice test.
Included Modules (6)
Take control of the compiler: how tsconfig.json is discovered, parsed and overridden, what...
Turn the strictness dial with intent: what the strict master switch actually enables, flag...
Decorators end to end: what a decorator is and when it runs, the experimentalDecorators le...
Make big codebases compile fast: incremental builds and the tsbuildinfo cache, composite p...
Configuration at production scale: extends chains and shareable base configs (including TS...
Prove your compiler mastery: 50 exam-style questions sweeping every Level 9 topic - tsconf...
Expert Capstone: Real-World Projects & Library Authoring
Level 10 is the expert capstone: shipping real software. Build publishable libraries - public API design and module layout, package.json exports maps and entry points, dual ESM/CJS output, semver discipline and @deprecated migration paths; master advanced declaration publishing - hand-authored .d.ts files, type testing with tsd and expect-type, generics designed for inference, branded, opaque and nominal types, and TSDoc documentation that shines in editor hovers; scale with enterprise patterns - monorepo workspaces with project references, shared tsconfig and ESLint packages, API boundary enforcement with @internal tags, barrels and api-extractor, OpenAPI and GraphQL codegen, and schema-first full-stack type sharing; engineer releases - test runners and typed mocks, type-coverage gates, changesets and semantic-release with npm provenance, tsup and unbuild bundles, and CI caching with merge-blocking type checks; and cap it with the full typed application: layered architecture and DTO boundaries, zod-validated end-to-end types, typed state machines with discriminated unions, Result-style error handling, and codemod-driven refactoring with type-coverage metrics. Ends with a 50-question full practice test.
Included Modules (6)
Ship it: the anatomy of a publishable TypeScript library (compiled output, declarations, b...
Publish types like a pro: hand-authoring .d.ts files for untyped packages and global augme...
Scale TypeScript across an organization: monorepo layouts that combine package-manager wor...
Engineer the release: TypeScript test runners and their transforms (vitest/esbuild speed v...
Put it all together: layered application architecture with domain types and DTO boundaries...
The final gate of the TypeScript course: 50 exam-style questions sweeping every Level 10 t...
Frequently Asked Questions
Everything you need to know about enrolling and learning TypeScript on WordThesauri.
How are the 10 progressive levels structured for TypeScript? +
Every subject is broken down into 10 structured levels moving systematically from foundational basics to expert proficiency, featuring modular units and interactive practice lessons.
Can I track my child or student’s progress in real-time? +
Yes! The Teacher/Parent Dashboard provides detailed progress reports, star & milestone tracking, and completion analytics for every student.
Is the first lesson of TypeScript really free? +
Yes. The first lesson is completely free to try. Every other lesson shows Upgrade to learn until you enroll in the full annual subscription.
How does the student seat pricing work for classrooms or families? +
You can purchase licenses per student seat on an annual subscription basis. Each student receives their own dedicated dashboard, rewards, and Kanban task board.
Are certificates awarded upon completing the course? +
Yes, students earn official Certificates of Completion as they conquer modules and milestones across the curriculum.
Why Choose WordThesauri for TypeScript Mastery?
Welcome to WordThesauri premier online learning track for TypeScript. Built specifically for independent learners, homeschoolers, and classroom educators, our curriculum breaks down complex topics into 10 structured, bite-sized progressive levels.
Structured for Permanent Skill Retention
Every level features carefully curated modules and practice lessons equipped with step-by-step worked solutions, real-time analytics, and milestone rewards. Whether you are starting from absolute fundamentals or advancing toward expert proficiency, our interactive platform guarantees steady academic growth.
Flexible Enrollment & Group Pricing
Parents and teachers can easily scale seats across multiple students using our annual subscription model, complete with dedicated child dashboards, printable certificates of completion, and automated progress reports. Try the first lesson for free today!