What are enums in typescript and how to use them?

Enums or enumerations are a new data type supported in TypeScript. Most object-oriented languages like Java and C# use enums. This is now available in TypeScript too. In simple words, enums allow us to declare a set of named constants i.e. a collection of related values that can be numeric or string values. There are three types of enums:

How do you declare a type from an enum?

Using an enum is simple: just access any member as a property off of the enum itself, and declare types using the name of the enum: // respond (“Princess Caroline”, UserResponse. Yes ); Numeric enums can be mixed in computed and constant members (see below) .

Which enum is also an object in JavaScript?

An enum is also an object in Javascript. Object class provides the following methods The Object.keys () method returns array of the keys of an object The Object.values () method returns an array of values or properties of an object

What is enenum reverse mapping in typescript?

Enum in TypeScript supports reverse mapping. It means we can access the value of a member and also a member name from its value. Consider the following example.

What is a TypeScript development environment?

An environment in which you can execute TypeScript programs to follow along with the examples. To set this up on your local machine, you will need the following: Both Node and npm (or yarn) installed in order to run a development environment that handles TypeScript-related packages.

Where can I find more information on import statements in typescript?

For more information on import statements and best practices regarding modules (now namespaces) in typescript, please check out their documentation: https://www.typescriptlang.org/docs/handbook/modules.html https://www.typescriptlang.org/docs/handbook/namespaces-and-modules.html