Saturday, November 28, 2020

How to assign property value while initializing class in typescript

 While creating new object you want to set the value of few fields of class , then you can use following feature of typescript to do that : 


class Person {
    public name: string = "default"
    public address: string = "default"
    public age: number = 0;

    public constructor(init?:Partial<Person>) {
        Object.assign(this, init);
    }
}

let persons = [
    new Person(),
    new Person({}),
    new Person({name:"John"}),
    new Person({address:"Earth"}),    
    new Person({age:20, address:"Earth", name:"John"}),
];


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