TypeScript tutorialLesson 11Free preview

TS Aliases & Interfaces

This lesson is part of TypeScript · All levels

Summary

Type alias gives other names to any type, including unions and objects. Interface defines a contract as a property and method that an object or class must satisfy. The two are often used together, and the interface supports declaration merging whereas type alias do not.

Key points

Type to name any type
Interface describes the object contract
The interface can be redeclared to merge

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