Typescript Class Enum Pattern

class_enum.ts

type BothOptions = 'raw_emg';
class Both {
  public static RawEMG: Both = new Both('raw_emg');
  private value: BothOptions;
  private constructor(value: BothOptions) {
    this.value = value;
  }
  public rawValue(): BothOptions {
    return this.value;
  }
  public targetName(): string {
    return this.value + "_target";
  }
  public batchTypeName(): string {
    return this.value + "_batch";
  }
}