How to check if a property exists in a class?

Question

typescript

I want to check a property in a class and set its value to ?

export class Test {
  public name: string;
  public type: string;

  constructor(props) {
    Object.keys(props).map(item => {
      if(this.hasOwnProperty(item)) {
        this[item] = props[item]
      }
    })
  }
}

    const test = new Test({ name: 'Dima' });

    console.log(test);

The object is created but empty.