Validation error in angular input[type=number]?












1














I have a strange problem when trying to validate input[type=number] in Angular 7 and hope that somebody can help. 



    <input class="form-control" type="number" name="entranceFee" min="0" [(ngModel)]="entranceFee" #entranceFee="ngModel" pattern="\d+" [ngClass]="{ 'is-invalid': entranceFee.touched && entranceFee.invalid }" >

    <div *ngIf="entranceFee.invalid && entranceFee.touched" class="invalid-feedback">

        <div *ngIf="entranceFee.errors.pattern">Only numbers are permitted</div>

        <div *ngIf="entranceFee.errors.min">Value cannot be smaller than '0'</div>

    </div>


The input shall only accept numbers >= 0. But whenever I enter a number value (0-9) the form becomes invalid. Why? When I output the ngModel in the console in ngAfterViewChecked() a number value was written to the model. So how can I validate this form? Is there a bug in the validator or in my head?



The same happens when implementing this code with reactive forms and/or with input[type=text]






angular validation angular2-template







share|improve this question






















  • It's a number input, so using pattern is useless. The input only accepts numbers. And min is not a validation directive. It's only a standard html attribute that the browser uses to prevent you from spinning belos the minimum.
    – JB Nizet
    Dec 28 '18 at 9:51










  • not really, because it is possible to enter the letter "e". 1e1 makes sense but you can also enter e.g. "eeee"
    – Lars Hagen
    Dec 28 '18 at 14:42
















1














I have a strange problem when trying to validate input[type=number] in Angular 7 and hope that somebody can help. 



    <input class="form-control" type="number" name="entranceFee" min="0" [(ngModel)]="entranceFee" #entranceFee="ngModel" pattern="\d+" [ngClass]="{ 'is-invalid': entranceFee.touched && entranceFee.invalid }" >

    <div *ngIf="entranceFee.invalid && entranceFee.touched" class="invalid-feedback">

        <div *ngIf="entranceFee.errors.pattern">Only numbers are permitted</div>

        <div *ngIf="entranceFee.errors.min">Value cannot be smaller than '0'</div>

    </div>


The input shall only accept numbers >= 0. But whenever I enter a number value (0-9) the form becomes invalid. Why? When I output the ngModel in the console in ngAfterViewChecked() a number value was written to the model. So how can I validate this form? Is there a bug in the validator or in my head?



The same happens when implementing this code with reactive forms and/or with input[type=text]






angular validation angular2-template







share|improve this question






















  • It's a number input, so using pattern is useless. The input only accepts numbers. And min is not a validation directive. It's only a standard html attribute that the browser uses to prevent you from spinning belos the minimum.
    – JB Nizet
    Dec 28 '18 at 9:51










  • not really, because it is possible to enter the letter "e". 1e1 makes sense but you can also enter e.g. "eeee"
    – Lars Hagen
    Dec 28 '18 at 14:42














1












1








1







I have a strange problem when trying to validate input[type=number] in Angular 7 and hope that somebody can help. 



    <input class="form-control" type="number" name="entranceFee" min="0" [(ngModel)]="entranceFee" #entranceFee="ngModel" pattern="\d+" [ngClass]="{ 'is-invalid': entranceFee.touched && entranceFee.invalid }" >

    <div *ngIf="entranceFee.invalid && entranceFee.touched" class="invalid-feedback">

        <div *ngIf="entranceFee.errors.pattern">Only numbers are permitted</div>

        <div *ngIf="entranceFee.errors.min">Value cannot be smaller than '0'</div>

    </div>


The input shall only accept numbers >= 0. But whenever I enter a number value (0-9) the form becomes invalid. Why? When I output the ngModel in the console in ngAfterViewChecked() a number value was written to the model. So how can I validate this form? Is there a bug in the validator or in my head?



The same happens when implementing this code with reactive forms and/or with input[type=text]






angular validation angular2-template







share|improve this question













I have a strange problem when trying to validate input[type=number] in Angular 7 and hope that somebody can help. 



    <input class="form-control" type="number" name="entranceFee" min="0" [(ngModel)]="entranceFee" #entranceFee="ngModel" pattern="\d+" [ngClass]="{ 'is-invalid': entranceFee.touched && entranceFee.invalid }" >

    <div *ngIf="entranceFee.invalid && entranceFee.touched" class="invalid-feedback">

        <div *ngIf="entranceFee.errors.pattern">Only numbers are permitted</div>

        <div *ngIf="entranceFee.errors.min">Value cannot be smaller than '0'</div>

    </div>


The input shall only accept numbers >= 0. But whenever I enter a number value (0-9) the form becomes invalid. Why? When I output the ngModel in the console in ngAfterViewChecked() a number value was written to the model. So how can I validate this form? Is there a bug in the validator or in my head?



The same happens when implementing this code with reactive forms and/or with input[type=text]






angular validation angular2-template




angular validation angular2-template






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Dec 28 '18 at 9:45









Lars HagenLars Hagen

263




263












  • It's a number input, so using pattern is useless. The input only accepts numbers. And min is not a validation directive. It's only a standard html attribute that the browser uses to prevent you from spinning belos the minimum.
    – JB Nizet
    Dec 28 '18 at 9:51










  • not really, because it is possible to enter the letter "e". 1e1 makes sense but you can also enter e.g. "eeee"
    – Lars Hagen
    Dec 28 '18 at 14:42


















  • It's a number input, so using pattern is useless. The input only accepts numbers. And min is not a validation directive. It's only a standard html attribute that the browser uses to prevent you from spinning belos the minimum.
    – JB Nizet
    Dec 28 '18 at 9:51










  • not really, because it is possible to enter the letter "e". 1e1 makes sense but you can also enter e.g. "eeee"
    – Lars Hagen
    Dec 28 '18 at 14:42
















It's a number input, so using pattern is useless. The input only accepts numbers. And min is not a validation directive. It's only a standard html attribute that the browser uses to prevent you from spinning belos the minimum.
– JB Nizet
Dec 28 '18 at 9:51




It's a number input, so using pattern is useless. The input only accepts numbers. And min is not a validation directive. It's only a standard html attribute that the browser uses to prevent you from spinning belos the minimum.
– JB Nizet
Dec 28 '18 at 9:51












not really, because it is possible to enter the letter "e". 1e1 makes sense but you can also enter e.g. "eeee"
– Lars Hagen
Dec 28 '18 at 14:42




not really, because it is possible to enter the letter "e". 1e1 makes sense but you can also enter e.g. "eeee"
– Lars Hagen
Dec 28 '18 at 14:42












1 Answer
1






active

oldest

votes


















1














Give this a try:



<input 

  class="form-control" 

  type="number" 

  name="entranceFee"

  #entranceFee="ngModel"  

  [(ngModel)]="entranceFee.value"

  pattern="^[+]?([0-9]+(?:[.][0-9]*)?|.[0-9]+)$"

  [ngClass]="{ 'is-invalid': entranceFee.touched && entranceFee.invalid }" >



<div *ngIf="entranceFee.invalid && entranceFee.touched" class="invalid-feedback">

  <div *ngIf="entranceFee.errors.pattern">Only numbers are permitted</div>

  <div *ngIf="entranceFee.errors.min">Value cannot be smaller than '0'</div>

</div>




Here's a Working Sample StackBlitz for your ref.





RegEx Courtesy - This Answer






share|improve this answer





















  • The pattern is accept e. Ex. 3e3
    – Manikandan Velayutham
    Dec 28 '18 at 12:15













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1 Answer
1






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oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









1














Give this a try:



<input 

  class="form-control" 

  type="number" 

  name="entranceFee"

  #entranceFee="ngModel"  

  [(ngModel)]="entranceFee.value"

  pattern="^[+]?([0-9]+(?:[.][0-9]*)?|.[0-9]+)$"

  [ngClass]="{ 'is-invalid': entranceFee.touched && entranceFee.invalid }" >



<div *ngIf="entranceFee.invalid && entranceFee.touched" class="invalid-feedback">

  <div *ngIf="entranceFee.errors.pattern">Only numbers are permitted</div>

  <div *ngIf="entranceFee.errors.min">Value cannot be smaller than '0'</div>

</div>




Here's a Working Sample StackBlitz for your ref.





RegEx Courtesy - This Answer






share|improve this answer





















  • The pattern is accept e. Ex. 3e3
    – Manikandan Velayutham
    Dec 28 '18 at 12:15


















1














Give this a try:



<input 

  class="form-control" 

  type="number" 

  name="entranceFee"

  #entranceFee="ngModel"  

  [(ngModel)]="entranceFee.value"

  pattern="^[+]?([0-9]+(?:[.][0-9]*)?|.[0-9]+)$"

  [ngClass]="{ 'is-invalid': entranceFee.touched && entranceFee.invalid }" >



<div *ngIf="entranceFee.invalid && entranceFee.touched" class="invalid-feedback">

  <div *ngIf="entranceFee.errors.pattern">Only numbers are permitted</div>

  <div *ngIf="entranceFee.errors.min">Value cannot be smaller than '0'</div>

</div>




Here's a Working Sample StackBlitz for your ref.





RegEx Courtesy - This Answer






share|improve this answer





















  • The pattern is accept e. Ex. 3e3
    – Manikandan Velayutham
    Dec 28 '18 at 12:15
















1












1








1






Give this a try:



<input 

  class="form-control" 

  type="number" 

  name="entranceFee"

  #entranceFee="ngModel"  

  [(ngModel)]="entranceFee.value"

  pattern="^[+]?([0-9]+(?:[.][0-9]*)?|.[0-9]+)$"

  [ngClass]="{ 'is-invalid': entranceFee.touched && entranceFee.invalid }" >



<div *ngIf="entranceFee.invalid && entranceFee.touched" class="invalid-feedback">

  <div *ngIf="entranceFee.errors.pattern">Only numbers are permitted</div>

  <div *ngIf="entranceFee.errors.min">Value cannot be smaller than '0'</div>

</div>




Here's a Working Sample StackBlitz for your ref.





RegEx Courtesy - This Answer






share|improve this answer












Give this a try:



<input 

  class="form-control" 

  type="number" 

  name="entranceFee"

  #entranceFee="ngModel"  

  [(ngModel)]="entranceFee.value"

  pattern="^[+]?([0-9]+(?:[.][0-9]*)?|.[0-9]+)$"

  [ngClass]="{ 'is-invalid': entranceFee.touched && entranceFee.invalid }" >



<div *ngIf="entranceFee.invalid && entranceFee.touched" class="invalid-feedback">

  <div *ngIf="entranceFee.errors.pattern">Only numbers are permitted</div>

  <div *ngIf="entranceFee.errors.min">Value cannot be smaller than '0'</div>

</div>




Here's a Working Sample StackBlitz for your ref.





RegEx Courtesy - This Answer







share|improve this answer












share|improve this answer



share|improve this answer










answered Dec 28 '18 at 9:50









SiddAjmeraSiddAjmera

13.1k31137




13.1k31137












  • The pattern is accept e. Ex. 3e3
    – Manikandan Velayutham
    Dec 28 '18 at 12:15




















  • The pattern is accept e. Ex. 3e3
    – Manikandan Velayutham
    Dec 28 '18 at 12:15


















The pattern is accept e. Ex. 3e3
– Manikandan Velayutham
Dec 28 '18 at 12:15






The pattern is accept e. Ex. 3e3
– Manikandan Velayutham
Dec 28 '18 at 12:15




















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