Iterating over the keys and values in an object is a common operation that's surprisingly hard to write without type assertions in TypeScript. Creating your models with a TypeScript interface extends these benefits by creating a strongly typed model that increases developer confidence, development speed and reduces bugs. Typescript allows an interface to inherit from multiple interfaces. @M98 An interface can be used to describe a structure. In other words, an interface can inherit from other interface. So basically interface will tell you the details of a particular object that what are the properties does an object can have and what is the type of those properties. In Typescript, an interface can be used to describe an Object's required properties along with their types. A class also encapsulates some methods that do some logic with that data. Syntax: Single Interface Inheritance Child_interface_name extends super_interface_name So if all you need is to define the type of a structure it's better to just use an interface. Tagged with javascript, typescript, webdev. An interface can be extended by other interfaces. Step 4 – Complex. So this is only appropriate if there is a prototype to extend in the first place – if in doubt, the interface style definitions are the way to go as any TypeScript code would have to implement the whole interface. somekind like this: interface BaseObject

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