Fluent builder pattern in TypeScript

FluentBuilder.ts

interface IBuilder<T> {
  build(): T
}

interface IValueModel {
  name: string
  date: Date
}

class FluentValueModelBuilder implements IBuilder<IValueModel> {

  public _valueModel: IValueModel = {
    date: new Date(),
    name: "Undfined" 
  }

  public build(): IValueModel {
    return this._valueModel
  }

  public setName(name: string): this {
    this._valueModel.name = name
    return this
  }

  public setDate(date: Date): this {
    this._valueModel.date = date
    return this
  }

}

const result = new FluentValueModelBuilder()
  .setDate(new Date())
  .setName("Gilfoyle")
  .build()
  
console.log(result)