how to uncheck/check a primeng checkbox manually
18,023
Solution 1
First, binding onChange event instead of click event. Then add checkbox instance to event
<p-checkbox name="showLinkedRisksOnly" #something id="showLinkedRisksOnlyChkBx" label="Show Only Linked Risks" binary="true" (click)="showOnlyLinkedRisks($event, something)" [ngModel]="showLinkedRisksOnly"></p-checkbox>
And in typescript
showOnlyLinkedRisks(event, control) {
if (false) {
control.checked = false;
} else { this.showLinkedRisksOnly = event.checked; }
}
Sorry for my bad english!
Solution 2
Method 1 - Handle ngModelChange + trigger change detection
To make the checkbox readonly, you can handle the ngModelChange
event:
<p-checkbox ...
[ngModel]="showLinkedRisksOnly"
(ngModelChange)="showOnlyLinkedRisks($event)">
</p-checkbox>
and follow these steps in the event handler:
- Set the new value
- If the checkbox is readonly
- Trigger change detection
- Put the original value back
constructor(private cd: ChangeDetectorRef) { }
showOnlyLinkedRisks(value) {
this.showLinkedRisksOnly = value; // Set the new value
if (!this.condition) { // If the checkbox is readonly
this.cd.detectChanges(); // Trigger change detection
this.showLinkedRisksOnly = !value; // Put the original value back
}
}
See this stackblitz for a demo.
Method 2 - Two-way binding + disable control
An alternative method is to use two-way binding, and to disable the control to prevent changes:
<p-checkbox ...
[(ngModel)]="showLinkedRisksOnly"
[disabled]="!condition">
</p-checkbox>
See this stackblitz for a demo.
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Author by
josh_boaz
Updated on June 04, 2022Comments
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josh_boaz almost 2 years
html
<p-checkbox name="showLinkedRisksOnly" id="showLinkedRisksOnlyChkBx" label="Show Only Linked Risks" binary="true" (click)="showOnlyLinkedRisks($event)" [ngModel]="showLinkedRisksOnly" ></p-checkbox>
typescript
showOnlyLinkedRisks($event){ if(condition){ this.showLinkedRisksOnly = !this.showLinkedRisksOnly; } }
I am trying to change the state of checkbox back to before it was checked/unchecked based on condition. But for some reason the checkbox and model get out of sync when I do change the value of this.showLinkedRisksOnly. Is it possible to achive
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Nino Filiu over 5 yearsYour code looks fine, I'm pretty sure the error can be found elsewhere in the code
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SeleM over 5 yearsCould you elaborate more? ur code seems working.
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josh_boaz over 5 yearsi am changing the value of model, but its not updating in UI
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SeleM over 5 yearsTry
[(ngModel)]
instead of[ngModel]
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SeleM over 5 yearsProvide a stackblitz
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Rafael Lucini over 5 yearsUse banana inbox instead. [(ngModel)]
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josh_boaz over 5 yearsi want to control the value of ngmodel inside my component, don't want it be controlled by ui interaction
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