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429What is an Intersection Type?
430Basic Intersection Syntax
431Intersecting Object Types
432Intersection vs Extension
433Multiple Type Intersections
434Intersections with Primitives
435Order Independence
436Intersection with Functions
437When to Use Intersections
438Reading Intersection Error Messages
439Property Type Conflicts in Intersections
440Primitive Type Intersections
441Function Type Intersections
442Intersection vs Union for Optional Properties
443Index Signature Conflicts
444Method Overload Intersections
445Intersecting with never
446Distributive Property Limitations
447Intersection Order Independence
448Deep Property Conflicts
449Mixing Object Types with Intersections
450Extending Base Types with Capabilities
451Mixin Pattern with Intersections
452Combining Interface and Type Alias
453Adding Branding or Tags via Intersection
454Intersection with Utility Types
455Avoiding Intersection Overuse
456Real-World Intersection Use Cases

429What is an Intersection Type?
430Basic Intersection Syntax
431Intersecting Object Types
432Intersection vs Extension
433Multiple Type Intersections
434Intersections with Primitives
435Order Independence
436Intersection with Functions
437When to Use Intersections
438Reading Intersection Error Messages
439Property Type Conflicts in Intersections
440Primitive Type Intersections
441Function Type Intersections
442Intersection vs Union for Optional Properties
443Index Signature Conflicts
444Method Overload Intersections
445Intersecting with never
446Distributive Property Limitations
447Intersection Order Independence
448Deep Property Conflicts
449Mixing Object Types with Intersections
450Extending Base Types with Capabilities
451Mixin Pattern with Intersections
452Combining Interface and Type Alias
453Adding Branding or Tags via Intersection
454Intersection with Utility Types
455Avoiding Intersection Overuse
456Real-World Intersection Use Cases

Lesson 450 of 1,796·10. Intersection TypesPro lesson

Extending Base Types with Capabilities

Use intersections to add optional capabilities or metadata fields to existing types without modifying them.

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