set value for default selected option in ionic 4

Set value for default selected option in ionic 4

In Ionic 4, to set a default selected option in a select component, you can use the ngModel directive or the [(ngModel)] two-way data binding syntax. Here's how you can do it:

Assuming you have an Ionic select component in your template like this:

<ion-item> <ion-label>Select Option</ion-label> <ion-select [(ngModel)]="selectedOption"> <ion-select-option value="option1">Option 1</ion-select-option> <ion-select-option value="option2">Option 2</ion-select-option> <ion-select-option value="option3">Option 3</ion-select-option> </ion-select> </ion-item>

In your component class, you can set the selectedOption property to the value of the option you want to be selected by default:

import { Component } from '@angular/core'; @Component({ selector: 'app-your-component', templateUrl: './your-component.component.html', styleUrls: ['./your-component.component.scss'], }) export class YourComponent { selectedOption = 'option2'; // Set the default selected option here constructor() {} }

In this example, selectedOption is set to 'option2', so the option with the value 'option2' will be selected by default when the page loads.

You can change the value of selectedOption to any other option value if you want a different option to be selected by default.

Examples

  1. How to Set Default Selected Option in Ionic 4 Select

    • Description: This query seeks guidance on setting a default value for the selected option in an Ionic 4 <ion-select> element to preselect an option when the page loads.
    • Code Implementation:
      <ion-select [(ngModel)]="selectedOption"> <ion-select-option value="option1">Option 1</ion-select-option> <ion-select-option value="option2">Option 2</ion-select-option> <ion-select-option value="option3" selected>Option 3</ion-select-option> </ion-select>

  2. Ionic 4 Select Default Option Value

    • Description: This query explores methods for specifying a default option value in an Ionic 4 <ion-select> component to have an option preselected by default.
    • Code Implementation:
      <ion-select [(ngModel)]="selectedOption" value="option2"> <ion-select-option value="option1">Option 1</ion-select-option> <ion-select-option value="option2">Option 2</ion-select-option> <ion-select-option value="option3">Option 3</ion-select-option> </ion-select>

  3. Ionic 4 Set Default Selected Value in Select

    • Description: This query focuses on setting a default selected value in an Ionic 4 <ion-select> dropdown to have an option preselected when the dropdown loads.
    • Code Implementation:
      <ion-select [(ngModel)]="selectedOption"> <ion-select-option value="option1">Option 1</ion-select-option> <ion-select-option value="option2" selected>Option 2</ion-select-option> <ion-select-option value="option3">Option 3</ion-select-option> </ion-select>

  4. Ionic 4 Select Default Option Preselection

    • Description: This query aims to preselect a default option in an Ionic 4 <ion-select> dropdown menu when the page initializes.
    • Code Implementation:
      <ion-select [(ngModel)]="selectedOption"> <ion-select-option value="option1" selected>Option 1</ion-select-option> <ion-select-option value="option2">Option 2</ion-select-option> <ion-select-option value="option3">Option 3</ion-select-option> </ion-select>

  5. Setting Default Selected Value in Ionic 4 Select

    • Description: This query explores techniques for specifying a default selected value in an Ionic 4 <ion-select> component to have an option preselected on page load.
    • Code Implementation:
      <ion-select [(ngModel)]="selectedOption"> <ion-select-option value="option1">Option 1</ion-select-option> <ion-select-option value="option2" selected>Option 2</ion-select-option> <ion-select-option value="option3">Option 3</ion-select-option> </ion-select>

  6. Ionic 4 Select Default Option On Page Load

    • Description: This query seeks methods to automatically set a default selected option in an Ionic 4 <ion-select> dropdown when the page loads.
    • Code Implementation:
      <ion-select [(ngModel)]="selectedOption"> <ion-select-option value="option1" selected>Option 1</ion-select-option> <ion-select-option value="option2">Option 2</ion-select-option> <ion-select-option value="option3">Option 3</ion-select-option> </ion-select>

  7. Ionic 4 Set Value for Default Selection

    • Description: This query focuses on setting a value for the default selected option in an Ionic 4 <ion-select> element to preselect an option when the component initializes.
    • Code Implementation:
      <ion-select [(ngModel)]="selectedOption"> <ion-select-option value="option1">Option 1</ion-select-option> <ion-select-option value="option2" selected>Option 2</ion-select-option> <ion-select-option value="option3">Option 3</ion-select-option> </ion-select>

  8. Ionic 4 Default Selected Option Value

    • Description: This query seeks information on specifying a default selected option value in an Ionic 4 <ion-select> dropdown menu for initial preselection.
    • Code Implementation:
      <ion-select [(ngModel)]="selectedOption"> <ion-select-option value="option1">Option 1</ion-select-option> <ion-select-option value="option2" selected>Option 2</ion-select-option> <ion-select-option value="option3">Option 3</ion-select-option> </ion-select>

  9. Ionic 4 Set Initial Value for Select

    • Description: This query aims to set an initial default value for an Ionic 4 <ion-select> dropdown to have a specific option preselected when the component loads.
    • Code Implementation:
      <ion-select [(ngModel)]="selectedOption" value="option2"> <ion-select-option value="option1">Option 1</ion-select-option> <ion-select-option value="option2">Option 2</ion-select-option> <ion-select-option value="option3">Option 3</ion-select-option> </ion-select>

  10. Ionic 4 Select Default Value on Page Load

    • Description: This query explores methods to set a default value for the selected option in an Ionic 4 <ion-select> dropdown component when the page initially loads.
    • Code Implementation:
      <ion-select [(ngModel)]="selectedOption" value="option2"> <ion-select-option value="option1">Option 1</ion-select-option> <ion-select-option value="option2">Option 2</ion-select-option> <ion-select-option value="option3">Option 3</ion-select-option> </ion-select>

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