SOLID - OCP - VIOLATION - EXAMPLE 2

solid-ocp-violation-two.ts

class clients {

  public function sendEmail (emailType: string){
    if (emailType === 'html'){
      let email = parseHtml(this.email);
    } else if (emailType === 'plainText'){
      let email = parsePlainText(this.email);
    } else if (emailType === 'numeric') {
      let email = parseNumeric(this.email);
    }
    return util.sendEmail(this.email, this.user);
  }
  
}