Alert controller input box validation

Question

How to validate and show error for Input in Alert Controller in Ionic 2 or 3

let prompt = Alert.create({
      title: 'Alert input validation',
      message: "How can I validate below input field?",
      inputs: [ 
        {
          name: 'email',
          placeholder: 'email'
        },
      ],
      buttons: [
        {
          text: 'Save',
          handler: data => {
                        let validateObj = this.validateEmail(data);
                        if (!validateObj.isValid) {
                            alert(validateObj.message);
                            return false;
                        } else {
                            //make HTTP call
                        }
                    }
        }
      ]
    });

Some one already updated alertcontroller and did pull request for Ionic team. i think Ionic team planning implement this in future. https://github.com/ionic-team/ionic/pull/12541

I need some work around for this validation feature.

plnkr http://plnkr.co/edit/IBonfBJngky0h8UtMwMD?p=preview

Appreciate your help.

Answer 1

At this moment this feature has not been implemented.You can see this Git issue.

I have used Toast notification here and I didn't get any complaint about it from my client :)

Here is what I have done.

alert boxe's done handler:

{
          text: 'Done',
          handler: (data) => {
            if (EmailValidator.isValid(data.email)) {
              if (this.data) {
                //my code
              } else {
                //my code
              }
              return true;
            } else {
              this.showErrorToast('Invalid Email');
              return false;
            }
          }
        }

Toast method is like this:

showErrorToast(data: any) {
    let toast = this.toastCtrl.create({
      message: data,
      duration: 3000,
      position: 'top'
    });

    toast.onDidDismiss(() => {
      console.log('Dismissed toast');
    });

    toast.present();
  }

UI