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Programming languages · 30 lessons · up to 10 minutes each
TypeScript
A planned TypeScript sequence from annotations to reusable, strongly checked contracts.
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TypeScript
Permanent access to the lessons published in this track when you buy. Future lessons are not included. 0 of 30 lessons are published; 0 are in owner review and 30 are Coming Soon.
$29.0030 lessons still in progress
Beginner
Lessons 1–10
01 TypeScript: Sketch inference, annotations, and compiler setup
Topic: inference, annotations, and compiler setup
Draw a small map of inference, annotations, and compiler setup in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Beginner4 minComing Soon02 TypeScript: Name the parts of primitive, literal, and object types
Topic: primitive, literal, and object types
Label the main pieces in primitive, literal, and object types in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Beginner5 minComing Soon03 TypeScript: Trace an example of unions, narrowing, and control flow
Topic: unions, narrowing, and control flow
Follow one input through unions, narrowing, and control flow in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Beginner6 minComing Soon04 TypeScript: Compare choices for functions, overloads, and callbacks
Topic: functions, overloads, and callbacks
Write down one practical difference between functions, overloads, and callbacks in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Beginner7 minComing Soon05 TypeScript: Find the boundary in generics, constraints, and variance
Topic: generics, constraints, and variance
Mark where generics, constraints, and variance in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Beginner8 minComing Soon06 TypeScript: Inspect an example of interfaces, aliases, and composition
Topic: interfaces, aliases, and composition
Annotate a minimal example of interfaces, aliases, and composition in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Beginner9 minComing Soon07 TypeScript: Connect discriminated unions and exhaustive checks to a neighboring concept
Topic: discriminated unions and exhaustive checks
Show how discriminated unions and exhaustive checks in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Beginner10 minComing Soon08 TypeScript: Spot a failure mode in async APIs and typed error boundaries
Topic: async APIs and typed error boundaries
Describe one likely failure for async APIs and typed error boundaries in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Beginner3 minComing Soon09 TypeScript: Read an official example of modules, declarations, and library contracts
Topic: modules, declarations, and library contracts
Summarize an official example of modules, declarations, and library contracts in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Beginner5 minComing Soon10 TypeScript: Choose a use case for strict options, tests, and JavaScript runtime limits
Topic: strict options, tests, and JavaScript runtime limits
Match one small use case to strict options, tests, and JavaScript runtime limits in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Beginner6 minComing Soon
Intermediate
Lessons 11–20
11 TypeScript: Build an example with inference, annotations, and compiler setup
Topic: inference, annotations, and compiler setup
Create a small working example that uses inference, annotations, and compiler setup in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Intermediate4 minComing Soon12 TypeScript: Compose primitive, literal, and object types with another component
Topic: primitive, literal, and object types
Combine primitive, literal, and object types in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Intermediate5 minComing Soon13 TypeScript: Configure unions, narrowing, and control flow for a small case
Topic: unions, narrowing, and control flow
Set up unions, narrowing, and control flow in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Intermediate6 minComing Soon14 TypeScript: Validate inputs around functions, overloads, and callbacks
Topic: functions, overloads, and callbacks
Add a check around functions, overloads, and callbacks in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Intermediate7 minComing Soon15 TypeScript: Use generics, constraints, and variance in a short workflow
Topic: generics, constraints, and variance
Add generics, constraints, and variance in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Intermediate8 minComing Soon16 TypeScript: Refactor interfaces, aliases, and composition into a reusable unit
Topic: interfaces, aliases, and composition
Extract interfaces, aliases, and composition in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Intermediate9 minComing Soon17 TypeScript: Exercise discriminated unions and exhaustive checks with sample data
Topic: discriminated unions and exhaustive checks
Run sample data through discriminated unions and exhaustive checks in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Intermediate10 minComing Soon18 TypeScript: Observe async APIs and typed error boundaries outputs
Topic: async APIs and typed error boundaries
Capture the result of async APIs and typed error boundaries in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Intermediate3 minComing Soon19 TypeScript: Recover from a modules, declarations, and library contracts failure
Topic: modules, declarations, and library contracts
Handle one expected failure from modules, declarations, and library contracts in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Intermediate5 minComing Soon20 TypeScript: Document strict options, tests, and JavaScript runtime limits behavior
Topic: strict options, tests, and JavaScript runtime limits
Write a short usage note for strict options, tests, and JavaScript runtime limits in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Intermediate6 minComing Soon
Advanced
Lessons 21–30
21 TypeScript: Test a boundary around inference, annotations, and compiler setup
Topic: inference, annotations, and compiler setup
Add an edge-case test for inference, annotations, and compiler setup in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Advanced4 minComing Soon22 TypeScript: Harden primitive, literal, and object types
Topic: primitive, literal, and object types
Add the relevant access, safety, or validation control to primitive, literal, and object types in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Advanced5 minComing Soon23 TypeScript: Measure unions, narrowing, and control flow
Topic: unions, narrowing, and control flow
Record a small baseline for unions, narrowing, and control flow in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Advanced6 minComing Soon24 TypeScript: Reduce cost in functions, overloads, and callbacks
Topic: functions, overloads, and callbacks
Change one measurable cost in functions, overloads, and callbacks in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Advanced7 minComing Soon25 TypeScript: Diagnose a generics, constraints, and variance failure
Topic: generics, constraints, and variance
Use an observable signal to explain a failure in generics, constraints, and variance in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Advanced8 minComing Soon26 TypeScript: Make interfaces, aliases, and composition repeatable
Topic: interfaces, aliases, and composition
Show that rerunning interfaces, aliases, and composition in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Advanced9 minComing Soon27 TypeScript: Review trade-offs in discriminated unions and exhaustive checks
Topic: discriminated unions and exhaustive checks
Compare two documented approaches to discriminated unions and exhaustive checks in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Advanced10 minComing Soon28 TypeScript: Improve async APIs and typed error boundaries maintainability
Topic: async APIs and typed error boundaries
Refine async APIs and typed error boundaries in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Advanced3 minComing Soon29 TypeScript: Verify modules, declarations, and library contracts end to end
Topic: modules, declarations, and library contracts
Check that a complete small flow using modules, declarations, and library contracts in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Advanced5 minComing Soon30 TypeScript: Audit strict options, tests, and JavaScript runtime limits against its source docs
Topic: strict options, tests, and JavaScript runtime limits
Check the implementation of strict options, tests, and JavaScript runtime limits in the context of TypeScript inference, narrowing, generics, and strict checking; save a short example or check that demonstrates the result.
Advanced6 minComing Soon
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