Below is the toggle I am referring to:
<ion-toggle (ionChange)="notify(value)"></ion-toggle>
I am looking for a way to retrieve the value of the toggle when it is clicked in order to pass it as a parameter to the notify method. Any suggestions on how to achieve this?
Appreciate any help!
As illustrated in the Ionic2 Docs - Toggle, a more efficient approach would be to connect the toggle to a component property using ngModel.
Snippet of Component code:
public isToggled: boolean;
// ...
constructor(...) {
this.isToggled = false;
}
public notify() {
console.log("Toggled: "+ this.isToggled);
}
View:
<ion-toggle [(ngModel)]="isToggled" (ionChange)="notify()"></ion-toggle>
This way, there's no need to send the value separately as it's already linked to a property in your component and can be accessed using this.isToggled.
UPDATE
In line with the observation made by @GFoley83:
Exercise caution when using ionChange directly with
ngModel. The notify method will trigger whenever the value bound tongModelchanges, whether through user interaction or programmatic changes in your component (e.g., from an API call). As I recently encountered, clicking the toggle triggered unintended operations likePATCHrequests which affected other clients. To address this issue, we utilized:<ion-toggle [ngModel]="isToggled" (ngModelChange)="notifyAndUpdateIsToggled()"></ion-toggle>
In the ionChange event, you can utilize $event.
Example:
<ion-toggle (ionChange)="updateValue($event)"></ion-toggle>
JavaScript Controller:
updateValue(event) {
console.log(event.checked);
}
There are two methods for validation.
The first one follows the suggestion from @Chathuranga Silva
html
<ion-toggle (ionChange)="check($event)"></ion-toggle>ts
check(event: any) { console.log("toggled: "+event.target.checked); }The second method looks like this:
html
<ion-toggle (ionChange)="check()" [checked]="isChecked"></ion-toggle>ts
var isChecked: boolean = true;
check() {
console.log("toggled: "+ this.isChecked);
}
The choice between the two is yours, but I suggest the second option as it allows for easier manipulation of the toggle in the constructor/onInit and makes it simpler to utilize this value outside of the check() function.
Incorporate the $event parameter when using ionChange.
Example:
<ion-toggle (ionChange)="onChange($event)"></ion-toggle>
Function in Controller:
onChange(ev) {
console.log(ev.target.checked);
}
Here is an example of how to use this code:
<ion-toggle id="availabilityButton" [(ngModel)]="setOffOrNot"
(ionChange)="setAvailability()"></ion-toggle>
setAvailability(e) {
this.setOffOrNot = ... // Add your logic here
}
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