Conditional option selection from event on angular x
I have a Select list and I want to launch an action (event) after the user clicks on a choice (Option).
I used (change) event on the Select element, it works but it updated the selected item. there is not an event that can be launched on the click of an option?
The action I want is if the user clicks on an option I do a test if it's true I allow him to select this item, otherwise he stays on the current.
the current code :
<select id="myselect" (change)="verifyData($event.target.value)" formControlName="myElement">
<option *ngFor="let items of items" [value]="item.name">{{ item.name }}</option>
</select>
angular typescript edited Jan 2 at 22:33
Adam Genshaft
31829
asked Jan 2 at 18:13
AbadouAbadou
104
add a comment |
I have a Select list and I want to launch an action (event) after the user clicks on a choice (Option).
I used (change) event on the Select element, it works but it updated the selected item. there is not an event that can be launched on the click of an option?
The action I want is if the user clicks on an option I do a test if it's true I allow him to select this item, otherwise he stays on the current.
the current code :
<select id="myselect" (change)="verifyData($event.target.value)" formControlName="myElement">
<option *ngFor="let items of items" [value]="item.name">{{ item.name }}</option>
</select>
edited Jan 2 at 22:33
Adam Genshaft
31829
asked Jan 2 at 18:13
AbadouAbadou
104
add a comment |
I have a Select list and I want to launch an action (event) after the user clicks on a choice (Option).
I used (change) event on the Select element, it works but it updated the selected item. there is not an event that can be launched on the click of an option?
The action I want is if the user clicks on an option I do a test if it's true I allow him to select this item, otherwise he stays on the current.
the current code :
<select id="myselect" (change)="verifyData($event.target.value)" formControlName="myElement">
<option *ngFor="let items of items" [value]="item.name">{{ item.name }}</option>
</select>
edited Jan 2 at 22:33
Adam Genshaft
31829
asked Jan 2 at 18:13
AbadouAbadou
104
I have a Select list and I want to launch an action (event) after the user clicks on a choice (Option).
I used (change) event on the Select element, it works but it updated the selected item. there is not an event that can be launched on the click of an option?
The action I want is if the user clicks on an option I do a test if it's true I allow him to select this item, otherwise he stays on the current.
the current code :
<select id="myselect" (change)="verifyData($event.target.value)" formControlName="myElement">
<option *ngFor="let items of items" [value]="item.name">{{ item.name }}</option>
</select>
edited Jan 2 at 22:33
Adam Genshaft
31829
asked Jan 2 at 18:13
AbadouAbadou
104
edited Jan 2 at 22:33
Adam Genshaft
31829
asked Jan 2 at 18:13
AbadouAbadou
104
edited Jan 2 at 22:33
Adam Genshaft
31829
edited Jan 2 at 22:33
Adam Genshaft
31829
edited Jan 2 at 22:33
Adam Genshaft
31829
31829
asked Jan 2 at 18:13
AbadouAbadou
104
asked Jan 2 at 18:13
AbadouAbadou
104
asked Jan 2 at 18:13
AbadouAbadou
104
104
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
EDITED
You can subscribe to value changes of the form control and set it back to previous value if some logic meets your needs. This should work:
ngOnInit(item) {
this.oldValue = this.form.value.myElement;
this.form.get('myElement').valueChanges.subscribe((a) => {
if (a == 3) {
this.form.get('myElement').setValue(this.oldValue, { emitEvent: false });
} else {
this.oldValue = a;
}
});
}
Here's a link to a working example on stackblitz
https://stackblitz.com/edit/angular-conditional-select-change?file=src%2Fapp%2Fapp.component.ts
answered Jan 2 at 18:41
Adam GenshaftAdam Genshaft
31829
in angular the event click not working in option element, you can test it !! it not works !!
– Abadou
Jan 2 at 19:20
My mistake, I completely edited the answer and added a working example. Also I suggested a change of the question title. Hope it will help :)
– Adam Genshaft
Jan 2 at 21:40
Thank you, i will try this approch for my use case :)
– Abadou
Jan 2 at 21:48
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
EDITED
You can subscribe to value changes of the form control and set it back to previous value if some logic meets your needs. This should work:
ngOnInit(item) {
this.oldValue = this.form.value.myElement;
this.form.get('myElement').valueChanges.subscribe((a) => {
if (a == 3) {
this.form.get('myElement').setValue(this.oldValue, { emitEvent: false });
} else {
this.oldValue = a;
}
});
}
Here's a link to a working example on stackblitz
https://stackblitz.com/edit/angular-conditional-select-change?file=src%2Fapp%2Fapp.component.ts
answered Jan 2 at 18:41
Adam GenshaftAdam Genshaft
31829
in angular the event click not working in option element, you can test it !! it not works !!
– Abadou
Jan 2 at 19:20
My mistake, I completely edited the answer and added a working example. Also I suggested a change of the question title. Hope it will help :)
– Adam Genshaft
Jan 2 at 21:40
Thank you, i will try this approch for my use case :)
– Abadou
Jan 2 at 21:48
add a comment |
EDITED
You can subscribe to value changes of the form control and set it back to previous value if some logic meets your needs. This should work:
ngOnInit(item) {
this.oldValue = this.form.value.myElement;
this.form.get('myElement').valueChanges.subscribe((a) => {
if (a == 3) {
this.form.get('myElement').setValue(this.oldValue, { emitEvent: false });
} else {
this.oldValue = a;
}
});
}
Here's a link to a working example on stackblitz
https://stackblitz.com/edit/angular-conditional-select-change?file=src%2Fapp%2Fapp.component.ts
answered Jan 2 at 18:41
Adam GenshaftAdam Genshaft
31829
in angular the event click not working in option element, you can test it !! it not works !!
– Abadou
Jan 2 at 19:20
My mistake, I completely edited the answer and added a working example. Also I suggested a change of the question title. Hope it will help :)
– Adam Genshaft
Jan 2 at 21:40
Thank you, i will try this approch for my use case :)
– Abadou
Jan 2 at 21:48
add a comment |
EDITED
You can subscribe to value changes of the form control and set it back to previous value if some logic meets your needs. This should work:
ngOnInit(item) {
this.oldValue = this.form.value.myElement;
this.form.get('myElement').valueChanges.subscribe((a) => {
if (a == 3) {
this.form.get('myElement').setValue(this.oldValue, { emitEvent: false });
} else {
this.oldValue = a;
}
});
}
Here's a link to a working example on stackblitz
https://stackblitz.com/edit/angular-conditional-select-change?file=src%2Fapp%2Fapp.component.ts
answered Jan 2 at 18:41
Adam GenshaftAdam Genshaft
31829
EDITED
You can subscribe to value changes of the form control and set it back to previous value if some logic meets your needs. This should work:
ngOnInit(item) {
this.oldValue = this.form.value.myElement;
this.form.get('myElement').valueChanges.subscribe((a) => {
if (a == 3) {
this.form.get('myElement').setValue(this.oldValue, { emitEvent: false });
} else {
this.oldValue = a;
}
});
}
Here's a link to a working example on stackblitz
https://stackblitz.com/edit/angular-conditional-select-change?file=src%2Fapp%2Fapp.component.ts
answered Jan 2 at 18:41
Adam GenshaftAdam Genshaft
31829
edited Jan 2 at 21:36
answered Jan 2 at 18:41
Adam GenshaftAdam Genshaft
31829
answered Jan 2 at 18:41
Adam GenshaftAdam Genshaft
31829
answered Jan 2 at 18:41
Adam GenshaftAdam Genshaft
31829
31829
in angular the event click not working in option element, you can test it !! it not works !!
– Abadou
Jan 2 at 19:20
My mistake, I completely edited the answer and added a working example. Also I suggested a change of the question title. Hope it will help :)
– Adam Genshaft
Jan 2 at 21:40
Thank you, i will try this approch for my use case :)
– Abadou
Jan 2 at 21:48
add a comment |
in angular the event click not working in option element, you can test it !! it not works !!
– Abadou
Jan 2 at 19:20
My mistake, I completely edited the answer and added a working example. Also I suggested a change of the question title. Hope it will help :)
– Adam Genshaft
Jan 2 at 21:40
Thank you, i will try this approch for my use case :)
– Abadou
Jan 2 at 21:48
in angular the event click not working in option element, you can test it !! it not works !!
– Abadou
Jan 2 at 19:20
in angular the event click not working in option element, you can test it !! it not works !!
– Abadou
Jan 2 at 19:20
My mistake, I completely edited the answer and added a working example. Also I suggested a change of the question title. Hope it will help :)
– Adam Genshaft
Jan 2 at 21:40
My mistake, I completely edited the answer and added a working example. Also I suggested a change of the question title. Hope it will help :)
– Adam Genshaft
Jan 2 at 21:40
Thank you, i will try this approch for my use case :)
– Abadou
Jan 2 at 21:48
Thank you, i will try this approch for my use case :)
– Abadou
Jan 2 at 21:48
add a comment |
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