How To Return Enum In Javascript

This post will explain how to implement and use enumerations or enum types in Javascript.. Enums are types that contain a limited number of fixed values, as opposed to types like Number or String which can have a wide range of values.. This is useful for many situations For example, when describing seasons in temperate climates, you'll want to limit the options to certain possible values

The values in enums are not mutable. Though JavaScript has no support for a native enum type, it is possible to define enums using various approaches. These approaches make the code more expressive, self-documenting, and less error-prone. Implementing JavaScript Enums. There are three ways to implement enums in JavaScript Using plain objects

This object has most of the features that you would expect from an enum Get all allowed enum values Object.keysDirection returns an array 'Up', 'Down', 'Left', 'Right' Check if a value equals an enum value val Direction.Up Check if a value is in the enum Direction.hasOwnProperty'Up' However, there are a couple of limitations

An enum, short for enumeration, is a data type that allows a developer to define a set of named constants. In other words, an enum is a collection of values that do not change, and each value has a corresponding name. The example below demonstrates how to create an enum in Javascript const Colors RED 'red', BLUE 'blue', GREEN 'green'

In this code, we define a Status Enum with three possible values. The handleStatus function takes a status parameter and uses a switch statement to return a message based on the status. This approach enhances readability and maintainability, as it's clear what statuses are being handled, reducing the risk of typos or logic errors.

Open the demo. Sizes is a class that represents the enum. The enum constants are static fields on the class, e.g. static Small new Sizes'small'. Each instance of the Sizes class also has a private field value, which represents the raw value of the enum.. A nice advantage of the class-based enum is the ability to determine at runtime whether the value is an enum using instanceof operation.

javascript How to Use Enums in JavaScript - A Complete Guide How to Use Enums in JavaScript - A Complete Guide Introduction. Enums short for quotenumerationsquot are a useful feature for defining a set of named constants. While JavaScript doesn't natively support enums like TypeScript, you can implement them in various ways using

Better Maintainability Enums centralize related constants in one place, making it easier to update and manage them throughout the codebase. Reduced Errors By restricting possible values to a predefined set, enums help prevent errors caused by invalid or inconsistent values. Creating Enums in JavaScript

The order of appearance of enums in JavaScript is the usual natural order, one defined and used by other items. There may be some ills of using enums in JavaScript, otherwise JavaScript enumeration provides strong data type safety. Using them in fixed groups is considered a healthy practice. 9. Is Extending Enums Possible in JavaScript?

Whilst using Symbol as the enum value works fine for simple use cases, it can be handy to give properties to enums. This can be done by using an Object as the enum value containing the properties.. For example we can give each of the Colors a name and hex value Enum for common colors. readonly enum name string, hex string const Colors Object.freeze RED name quotred