/TypeScript/Singleton design pattern typescript

Singleton design pattern typescript

Typescript singleton

class MyClass
{
    private static _instance: MyClass;

    private constructor()
    {
        //...
    }

    public static get Instance()
    {
        // Do you need arguments? Make it a regular static method instead.
        return this._instance || (this._instance = new this());
    }
}

const myClassInstance = MyClass.Instance;

Source: stackoverflow.com

Singleton design pattern typescript

class Person {
	private static instance: Person

	private constructor() {}

	public static getInstance(): Person {
		if (!Person.instance) {
			Person.instance = new Person()
		}
		return Person.instance
	}

	public name(name: string): string {
		return name
	}

	public age(age: number): number {
		return age
	}

	public hobby(hobby: string): string {
		return hobby
	}
}

const res: Person = Person.getInstance()

console.log(`My name is ${res.name('john doe')} and My age is ${res.age(30)} and My hobby is ${res.hobby('programming')}`)

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