ion-alert

Contents

An Alert is a dialog that presents users with information or collects information from the user using inputs. An alert appears on top of the app's content, and must be manually dismissed by the user before they can resume interaction with the app. It can also optionally have a header, subHeader and message.

Creating

Alerts can be created using an Alert Controller. They can be customized by passing alert options in the alert controller's create method.

Buttons

In the array of buttons, each button includes properties for its text, and optionally a handler. If a handler returns false then the alert will not automatically be dismissed when the button is clicked. All buttons will show up in the order they have been added to the buttons array from left to right. Note: The right most button (the last one in the array) is the main button.

Optionally, a role property can be added to a button, such as cancel. If a cancel role is on one of the buttons, then if the alert is dismissed by tapping the backdrop, then it will fire the handler from the button with a cancel role.

Inputs

Alerts can also include several different inputs whose data can be passed back to the app. Inputs can be used as a simple way to prompt users for information. Radios, checkboxes and text inputs are all accepted, but they cannot be mixed. For example, an alert could have all radio button inputs, or all checkbox inputs, but the same alert cannot mix radio and checkbox inputs. Do note however, different types of "text" inputs can be mixed, such as url, email, text, etc. If you require a complex form UI which doesn't fit within the guidelines of an alert then we recommend building the form within a modal instead.

Usage

import { Component } from '@angular/core';
import { AlertController } from '@ionic/angular';

@Component({
  selector: 'alert-example',
  templateUrl: 'alert-example.html',
  styleUrls: ['./alert-example.css'],
})
export class AlertExample {

  constructor(public alertController: AlertController) {}

  async presentAlert() {
    const alert = await this.alertController.create({
      header: 'Alert',
      subHeader: 'Subtitle',
      message: 'This is an alert message.',
      buttons: ['OK']
    });

    await alert.present();
  }

  async presentAlertMultipleButtons() {
    const alert = await this.alertController.create({
      header: 'Alert',
      subHeader: 'Subtitle',
      message: 'This is an alert message.',
      buttons: ['Cancel', 'Open Modal', 'Delete']
    });

    await alert.present();
  }

  async presentAlertConfirm() {
    const alert = await this.alertController.create({
      header: 'Confirm!',
      message: 'Message <strong>text</strong>!!!',
      buttons: [
        {
          text: 'Cancel',
          role: 'cancel',
          cssClass: 'secondary',
          handler: (blah) => {
            console.log('Confirm Cancel: blah');
          }
        }, {
          text: 'Okay',
          handler: () => {
            console.log('Confirm Okay');
          }
        }
      ]
    });

    await alert.present();
  }

  async presentAlertPrompt() {
    const alert = await this.alertController.create({
      header: 'Prompt!',
      inputs: [
        {
          name: 'name1',
          type: 'text',
          placeholder: 'Placeholder 1'
        },
        {
          name: 'name2',
          type: 'text',
          id: 'name2-id',
          value: 'hello',
          placeholder: 'Placeholder 2'
        },
        {
          name: 'name3',
          value: 'http://ionicframework.com',
          type: 'url',
          placeholder: 'Favorite site ever'
        },
        // input date with min & max
        {
          name: 'name4',
          type: 'date',
          min: '2017-03-01',
          max: '2018-01-12'
        },
        // input date without min nor max
        {
          name: 'name5',
          type: 'date'
        },
        {
          name: 'name6',
          type: 'number',
          min: -5,
          max: 10
        },
        {
          name: 'name7',
          type: 'number'
        }
      ],
      buttons: [
        {
          text: 'Cancel',
          role: 'cancel',
          cssClass: 'secondary',
          handler: () => {
            console.log('Confirm Cancel');
          }
        }, {
          text: 'Ok',
          handler: () => {
            console.log('Confirm Ok');
          }
        }
      ]
    });

    await alert.present();
  }

  async presentAlertRadio() {
    const alert = await this.alertController.create({
      header: 'Radio',
      inputs: [
        {
          name: 'radio1',
          type: 'radio',
          label: 'Radio 1',
          value: 'value1',
          checked: true
        },
        {
          name: 'radio2',
          type: 'radio',
          label: 'Radio 2',
          value: 'value2'
        },
        {
          name: 'radio3',
          type: 'radio',
          label: 'Radio 3',
          value: 'value3'
        },
        {
          name: 'radio4',
          type: 'radio',
          label: 'Radio 4',
          value: 'value4'
        },
        {
          name: 'radio5',
          type: 'radio',
          label: 'Radio 5',
          value: 'value5'
        },
        {
          name: 'radio6',
          type: 'radio',
          label: 'Radio 6 Radio 6 Radio 6 Radio 6 Radio 6 Radio 6 Radio 6 Radio 6 Radio 6 Radio 6 ',
          value: 'value6'
        }
      ],
      buttons: [
        {
          text: 'Cancel',
          role: 'cancel',
          cssClass: 'secondary',
          handler: () => {
            console.log('Confirm Cancel');
          }
        }, {
          text: 'Ok',
          handler: () => {
            console.log('Confirm Ok');
          }
        }
      ]
    });

    await alert.present();
  }

  async presentAlertCheckbox() {
    const alert = await this.alertController.create({
      header: 'Checkbox',
      inputs: [
        {
          name: 'checkbox1',
          type: 'checkbox',
          label: 'Checkbox 1',
          value: 'value1',
          checked: true
        },

        {
          name: 'checkbox2',
          type: 'checkbox',
          label: 'Checkbox 2',
          value: 'value2'
        },

        {
          name: 'checkbox3',
          type: 'checkbox',
          label: 'Checkbox 3',
          value: 'value3'
        },

        {
          name: 'checkbox4',
          type: 'checkbox',
          label: 'Checkbox 4',
          value: 'value4'
        },

        {
          name: 'checkbox5',
          type: 'checkbox',
          label: 'Checkbox 5',
          value: 'value5'
        },

        {
          name: 'checkbox6',
          type: 'checkbox',
          label: 'Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6',
          value: 'value6'
        }
      ],
      buttons: [
        {
          text: 'Cancel',
          role: 'cancel',
          cssClass: 'secondary',
          handler: () => {
            console.log('Confirm Cancel');
          }
        }, {
          text: 'Ok',
          handler: () => {
            console.log('Confirm Ok');
          }
        }
      ]
    });

    await alert.present();
  }

}
async function presentAlert() {
  const alertController = document.querySelector('ion-alert-controller');
  await alertController.componentOnReady();

  const alert = await alertController.create({
    header: 'Alert',
    subHeader: 'Subtitle',
    message: 'This is an alert message.',
    buttons: ['OK']
  });
  return await alert.present();
}

async function presentAlertMultipleButtons() {
  const alertController = document.querySelector('ion-alert-controller');
  await alertController.componentOnReady();

  const alert = await alertController.create({
    header: 'Alert',
    subHeader: 'Subtitle',
    message: 'This is an alert message.',
    buttons: ['Cancel', 'Open Modal', 'Delete']
  });
  return await alert.present();
}

async function presentAlertConfirm() {
  const alertController = document.querySelector('ion-alert-controller');
  await alertController.componentOnReady();

  const alert = await alertController.create({
    header: 'Confirm!',
    message: 'Message <strong>text</strong>!!!',
    buttons: [
      {
        text: 'Cancel',
        role: 'cancel',
        cssClass: 'secondary',
        handler: (blah) => {
          console.log('Confirm Cancel: blah');
        }
      }, {
        text: 'Okay',
        handler: () => {
          console.log('Confirm Okay')
        }
      }
    ]
  });
  return await alert.present();
}

async function presentAlertPrompt() {
  const alertController = document.querySelector('ion-alert-controller');
  await alertController.componentOnReady();

  const alert = await alertController.create({
    header: 'Prompt!',
    inputs: [
      {
        placeholder: 'Placeholder 1'
      },
      {
        name: 'name2',
        id: 'name2-id',
        value: 'hello',
        placeholder: 'Placeholder 2'
      },
      {
        name: 'name3',
        value: 'http://ionicframework.com',
        type: 'url',
        placeholder: 'Favorite site ever'
      },
      // input date with min & max
      {
        name: 'name4',
        type: 'date',
        min: '2017-03-01',
        max: '2018-01-12'
      },
      // input date without min nor max
      {
        name: 'name5',
        type: 'date'
      },
      {
        name: 'name6',
        type: 'number',
        min: -5,
        max: 10
      },
      {
        name: 'name7',
        type: 'number'
      }
    ],
    buttons: [
      {
        text: 'Cancel',
        role: 'cancel',
        cssClass: 'secondary',
        handler: () => {
          console.log('Confirm Cancel')
        }
      }, {
        text: 'Ok',
        handler: () => {
          console.log('Confirm Ok')
        }
      }
    ]
  });
  return await alert.present();
}

async function presentAlertRadio() {
  const alertController = document.querySelector('ion-alert-controller');
  await alertController.componentOnReady();

  const alert = await alertController.create({
    header: 'Radio',
    inputs: [
      {
        type: 'radio',
        label: 'Radio 1',
        value: 'value1',
        checked: true
      },
      {
        type: 'radio',
        label: 'Radio 2',
        value: 'value2'
      },
      {
        type: 'radio',
        label: 'Radio 3',
        value: 'value3'
      },
      {
        type: 'radio',
        label: 'Radio 4',
        value: 'value4'
      },
      {
        type: 'radio',
        label: 'Radio 5',
        value: 'value5'
      },
      {
        type: 'radio',
        label: 'Radio 6 Radio 6 Radio 6 Radio 6 Radio 6 Radio 6 Radio 6 Radio 6 Radio 6 Radio 6 ',
        value: 'value6'
      }
    ],
    buttons: [
      {
        text: 'Cancel',
        role: 'cancel',
        cssClass: 'secondary',
        handler: () => {
          console.log('Confirm Cancel')
        }
      }, {
        text: 'Ok',
        handler: () => {
          console.log('Confirm Ok')
        }
      }
    ]
  });
  return await alert.present();
}

async function presentAlertCheckbox() {
  const alertController = document.querySelector('ion-alert-controller');
  await alertController.componentOnReady();

  const alert = await alertController.create({
    header: 'Checkbox',
    inputs: [
      {
        type: 'checkbox',
        label: 'Checkbox 1',
        value: 'value1',
        checked: true
      },

      {
        type: 'checkbox',
        label: 'Checkbox 2',
        value: 'value2'
      },

      {
        type: 'checkbox',
        label: 'Checkbox 3',
        value: 'value3'
      },

      {
        type: 'checkbox',
        label: 'Checkbox 4',
        value: 'value4'
      },

      {
        type: 'checkbox',
        label: 'Checkbox 5',
        value: 'value5'
      },

      {
        type: 'checkbox',
        label: 'Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6 Checkbox 6',
        value: 'value6'
      }
    ],
    buttons: [
      {
        text: 'Cancel',
        role: 'cancel',
        cssClass: 'secondary',
        handler: () => {
          console.log('Confirm Cancel')
        }
      }, {
        text: 'Ok',
        handler: () => {
          console.log('Confirm Ok')
        }
      }
    ]
  });
  return await alert.present();
}
import React, { Component } from 'react'
import { IonAlert } from '@ionic/react';

type Props = {}
type State = {
  showAlert1: boolean
  showAlert2: boolean
  showAlert3: boolean
  showAlert4: boolean
  showAlert5: boolean
  showAlert6: boolean
}

export default class AlertExample extends Component<Props, State> {

  constructor(props: Props) {
    super(props);
    this.state = {
      showAlert1: false
      showAlert2: false
      showAlert3: false
      showAlert4: false
      showAlert5: false
      showAlert6: false
    };
  }

  render() {
    return (
      <IonAlert
        isOpen={this.state.showAlert1}
        onDidDismiss={() => this.setState(() => ({ showAlert1: false }))}
        header={'Alert'}
        subHeader={'Subtitle'}
        message={'This is an alert message.'}
        buttons={['OK']}
      >
      </IonAlert>


      <IonAlert
        isOpen={this.state.showAlert2}
        onDidDismiss={() => this.setState(() => ({ showAlert2: false }))}
        header={'Alert'}
        subHeader={'Subtitle'}
        message={'This is an alert message.'}
        buttons={['Cancel', 'Open Modal', 'Delete']}
      >
      </IonAlert>


      <IonAlert
        isOpen={this.state.showAlert3}
        onDidDismiss={() => this.setState(() => ({ showAlert3: false }))}
        header={'Confirm!'}
        message={'Message <strong>text</strong>!!!'}
        buttons={[
          {
            text: 'Cancel',
            role: 'cancel',
            cssClass: 'secondary',
            handler: (blah) => {
              console.log('Confirm Cancel: blah');
            }
          }, {
            text: 'Okay',
            handler: () => {
              console.log('Confirm Okay');
            }
          }
        ]}
      >
      </IonAlert>


      <IonAlert
        isOpen={this.state.showAlert4}
        onDidDismiss={() => this.setState(() => ({ showAlert4: false }))}
        header={'Prompt!'}
        inputs={[
          {
            name: 'name1',
            type: 'text',
            placeholder: 'Placeholder 1'
          },
          {
            name: 'name2',
            type: 'text',
            id: 'name2-id',
            value: 'hello',
            placeholder: 'Placeholder 2'
          },
          {
            name: 'name3',
            value: 'http://ionicframework.com',
            type: 'url',
            placeholder: 'Favorite site ever'
          },
          // input date with min & max
          {
            name: 'name4',
            type: 'date',
            min: '2017-03-01',
            max: '2018-01-12'
          },
          // input date without min nor max
          {
            name: 'name5',
            type: 'date'
          },
          {
            name: 'name6',
            type: 'number',
            min: -5,
            max: 10
          },
          {
            name: 'name7',
            type: 'number'
          }
        ]}
        buttons={[
          {
            text: 'Cancel',
            role: 'cancel',
            cssClass: 'secondary',
            handler: () => {
              console.log('Confirm Cancel');
            }
          }, {
            text: 'Ok',
            handler: () => {
              console.log('Confirm Ok');
            }
          }
        ]}
      >
      </IonAlert>




      <IonAlert
        isOpen={this.state.showAlert5}
        onDidDismiss={() => this.setState(() => ({ showAlert5: false }))}
        header={'Radio'}
        inputs={[
          {
            name: 'radio1',
            type: 'radio',
            label: 'Radio 1',
            value: 'value1',
            checked: true
          },
          {
            name: 'radio2',
            type: 'radio',
            label: 'Radio 2',
            value: 'value2'
          },
          {
            name: 'radio3',
            type: 'radio',
            label: 'Radio 3',
            value: 'value3'
          },
          {
            name: 'radio4',
            type: 'radio',
            label: 'Radio 4',
            value: 'value4'
          },
          {
            name: 'radio5',
            type: 'radio',
            label: 'Radio 5',
            value: 'value5'
          },
          {
            name: 'radio6',
            type: 'radio',
            label: 'Radio 6',
            value: 'value6'
          }
        ]}
        buttons={[
          {
            text: 'Cancel',
            role: 'cancel',
            cssClass: 'secondary',
            handler: () => {
              console.log('Confirm Cancel');
            }
          }, {
            text: 'Ok',
            handler: () => {
              console.log('Confirm Ok');
            }
          }
        ]}
      >
      </IonAlert>



      <IonAlert
        isOpen={this.state.showAlert6}
        onDidDismiss={() => this.setState(() => ({ showAlert6: false }))}
        header={'Checkbox'}
        inputs={[
          {
            name: 'checkbox1',
            type: 'checkbox',
            label: 'Checkbox 1',
            value: 'value1',
            checked: true
          },
          {
            name: 'checkbox2',
            type: 'checkbox',
            label: 'Checkbox 2',
            value: 'value2'
          },
          {
            name: 'checkbox3',
            type: 'checkbox',
            label: 'Checkbox 3',
            value: 'value3'
          },
          {
            name: 'checkbox4',
            type: 'checkbox',
            label: 'Checkbox 4',
            value: 'value4'
          },
          {
            name: 'checkbox5',
            type: 'checkbox',
            label: 'Checkbox 5',
            value: 'value5'
          },
          {
            name: 'checkbox6',
            type: 'checkbox',
            label: 'Checkbox 6',
            value: 'value6'
          }
        ]}
        buttons={[
          {
            text: 'Cancel',
            role: 'cancel',
            cssClass: 'secondary',
            handler: () => {
              console.log('Confirm Cancel');
            }
          }, {
            text: 'Ok',
            handler: () => {
              console.log('Confirm Ok');
            }
          }
        ]}
      >
      </IonAlert>
    );
  }
}
<template>
  <IonVuePage :title="'Alert'">
    <ion-button @click="presentAlert">Show Alert</ion-button>
    <ion-button @click="presentAlertMultipleButtons">Show Alert (multiple buttons)</ion-button>
    <ion-button @click="presentAlertConfirm">Show Alert (confirm)</ion-button>
    <ion-button @click="presentAlertPrompt">Show Alert (prompt)</ion-button>
    <ion-button @click="presentAlertRadio">Show Alert (radio)</ion-button>
    <ion-button @click="presentAlertCheckbox">Show Alert (checkbox)</ion-button>
  </IonVuePage>
</template>

<script>
export default {
  methods: {
    presentAlert() {
      return this.$ionic.alertController
        .create({
          header: 'Alert',
          subHeader: 'Subtitle',
          message: 'This is an alert message.',
          buttons: ['OK'],
        })
        .then(a => a.present())
    },

    presentAlertMultipleButtons() {
      return this.$ionic.alertController
        .create({
          header: 'Alert',
          subHeader: 'Subtitle',
          message: 'This is an alert message.',
          buttons: ['Cancel', 'Open Modal', 'Delete'],
        })
        .then(a => a.present())
    },

    presentAlertConfirm() {
      return this.$ionic.alertController
        .create({
          header: 'Confirm!',
          message: 'Message <strong>text</strong>!!!',
          buttons: [
            {
              text: 'Cancel',
              role: 'cancel',
              cssClass: 'secondary',
              handler: blah => {
                console.log('Confirm Cancel:', blah)
              },
            },
            {
              text: 'Okay',
              handler: () => {
                console.log('Confirm Okay')
              },
            },
          ],
        })
        .then(a => a.present())
    },

    presentAlertPrompt() {
      return this.$ionic.alertController
        .create({
          header: 'Prompt!',
          inputs: [
            {
              placeholder: 'Placeholder 1',
            },
            {
              name: 'name2',
              id: 'name2-id',
              value: 'hello',
              placeholder: 'Placeholder 2',
            },
            {
              name: 'name3',
              value: 'http://ionicframework.com',
              type: 'url',
              placeholder: 'Favorite site ever',
            },
            // input date with min & max
            {
              name: 'name4',
              type: 'date',
              min: '2017-03-01',
              max: '2018-01-12',
            },
            // input date without min nor max
            {
              name: 'name5',
              type: 'date',
            },
            {
              name: 'name6',
              type: 'number',
              min: -5,
              max: 10,
            },
            {
              name: 'name7',
              type: 'number',
            },
          ],
          buttons: [
            {
              text: 'Cancel',
              role: 'cancel',
              cssClass: 'secondary',
              handler: () => {
                console.log('Confirm Cancel')
              },
            },
            {
              text: 'Ok',
              handler: () => {
                console.log('Confirm Ok')
              },
            },
          ],
        })
        .then(a => a.present())
    },

    presentAlertRadio() {
      return this.$ionic.alertController
        .create({
          header: 'Radio',
          inputs: [
            {
              type: 'radio',
              label: 'Radio 1',
              value: 'value1',
              checked: true,
            },
            {
              type: 'radio',
              label: 'Radio 2',
              value: 'value2',
            },
            {
              type: 'radio',
              label: 'Radio 3',
              value: 'value3',
            },
            {
              type: 'radio',
              label: 'Radio 4',
              value: 'value4',
            },
            {
              type: 'radio',
              label: 'Radio 5',
              value: 'value5',
            },
            {
              type: 'radio',
              label: 'Radio 6',
              value: 'value6',
            },
          ],
          buttons: [
            {
              text: 'Cancel',
              role: 'cancel',
              cssClass: 'secondary',
              handler: () => {
                console.log('Confirm Cancel')
              },
            },
            {
              text: 'Ok',
              handler: () => {
                console.log('Confirm Ok')
              },
            },
          ],
        })
        .then(a => a.present())
    },

    presentAlertCheckbox() {
      return this.$ionic.alertController
        .create({
          header: 'Checkbox',
          inputs: [
            {
              type: 'checkbox',
              label: 'Checkbox 1',
              value: 'value1',
              checked: true,
            },

            {
              type: 'checkbox',
              label: 'Checkbox 2',
              value: 'value2',
            },

            {
              type: 'checkbox',
              label: 'Checkbox 3',
              value: 'value3',
            },

            {
              type: 'checkbox',
              label: 'Checkbox 4',
              value: 'value4',
            },

            {
              type: 'checkbox',
              label: 'Checkbox 5',
              value: 'value5',
            },

            {
              type: 'checkbox',
              label: 'Checkbox 6',
              value: 'value6',
            },
          ],
          buttons: [
            {
              text: 'Cancel',
              role: 'cancel',
              cssClass: 'secondary',
              handler: () => {
                console.log('Confirm Cancel')
              },
            },
            {
              text: 'Ok',
              handler: () => {
                console.log('Confirm Ok')
              },
            },
          ],
        })
        .then(a => a.present())
    },
  },
}
</script>

Properties

animated

Description

If true, the alert will animate.

Attributeanimated
Typeboolean
Defaulttrue

backdropDismiss

Description

If true, the alert will be dismissed when the backdrop is clicked.

Attributebackdrop-dismiss
Typeboolean
Defaulttrue

buttons

Description

Array of buttons to be added to the alert.

Type(string | AlertButton)[]
Default[]

cssClass

Description

Additional classes to apply for custom CSS. If multiple classes are provided they should be separated by spaces.

Attributecss-class
Typestring | string[] | undefined

enterAnimation

Description

Animation to use when the alert is presented.

Type((Animation: Animation, baseEl: any, opts?: any) => Promise<Animation>) | undefined

header

Description

The main title in the heading of the alert.

Attributeheader
Typestring | undefined

inputs

Description

Array of input to show in the alert.

TypeAlertInput[]
Default[]

keyboardClose

Description

If true, the keyboard will be automatically dismissed when the overlay is presented.

Attributekeyboard-close
Typeboolean
Defaulttrue

leaveAnimation

Description

Animation to use when the alert is dismissed.

Type((Animation: Animation, baseEl: any, opts?: any) => Promise<Animation>) | undefined

message

Description

The main message to be displayed in the alert. message can accept either plaintext or HTML as a string. To display characters normally reserved for HTML, they must be escaped. For example <Ionic> would become &lt;Ionic&gt;

For more information: Security Documentation

Attributemessage
Typestring | undefined

mode

Description

The mode determines which platform styles to use.

Attributemode
Type"ios" | "md"

subHeader

Description

The subtitle in the heading of the alert. Displayed under the title.

Attributesub-header
Typestring | undefined

translucent

Description

If true, the alert will be translucent.

Attributetranslucent
Typeboolean
Defaultfalse

Events

NameDescription
ionAlertDidDismissEmitted after the alert has dismissed.
ionAlertDidPresentEmitted after the alert has presented.
ionAlertWillDismissEmitted before the alert has dismissed.
ionAlertWillPresentEmitted before the alert has presented.

Methods

dismiss

Description

Dismiss the alert overlay after it has been presented.

Signaturedismiss(data?: any, role?: string | undefined) => Promise<boolean>

onDidDismiss

Description

Returns a promise that resolves when the alert did dismiss.

SignatureonDidDismiss() => Promise<OverlayEventDetail<any>>

onWillDismiss

Description

Returns a promise that resolves when the alert will dismiss.

SignatureonWillDismiss() => Promise<OverlayEventDetail<any>>

present

Description

Present the alert overlay after it has been created.

Signaturepresent() => Promise<void>

CSS Custom Properties

NameDescription
--backgroundBackground of the alert
--heightHeight of the alert
--max-heightMaximum height of the alert
--max-widthMaximum width of the alert
--min-heightMinimum height of the alert
--min-widthMinimum width of the alert
--widthWidth of the alert