how to validate text in custom validate patterns using angular

Question

I want to validate text only using this pattern ~*\\|:"<>?/ . Below is my textbox

<input type="text" [(ngModel)] ="newReferenceValue"  #referencevar="ngModel" name="referencevar" (keyup.enter)="save()" pattern='^[^`~!@#$%\^&*()_+={}|[\]\\:"]*$' style="margin: 8px;width: 60%;">

 <div *ngIf="referencevar.errors?.pattern">
         not valid not partens  
  </div>

Answer 1

You use this way

html

<input type="text" [(ngModel)] ="newReferenceValue"  #referencevar="ngModel" name="referencevar" (keyup.enter)="save()" [pattern]="pattern" style="margin: 8px;width: 60%;">

 <div *ngIf="referencevar.errors?.pattern">
         not valid not partens  
  </div>

ts

pattern = '^[^`~!@#$%\^&*()_+={}|[\]\\:"]*$';

However, the best way of using the patterns would be by using the reactive forms, you can refer this link for more understanding.

Answer 2

Here is an example that help you and if you have any query ask me in comments

    <form role="form" name="form" (ngSubmit)="f.form.valid" #f="ngForm" novalidate>

    <input type="text" id="newReferenceValue" name="newReferenceValue" [(ngModel)] ="newReferenceValue"  #referencevar="ngModel" pattern="^[^`~!@#$%\^&*()_+={}|[\]\\:"]*$" (keyup.enter)="save()" [ngClass]="{ 'is-invalid': f.submitted && referencevar.invalid }" style="margin: 8px;width: 60%;">

<div *ngIf="f.submitted && referencevar.invalid" class="invalid-feedback">

 <div *ngIf="referencevar.errors.pattern" class="error"> not valid not partens</div>
                                                                     </div>

    </form>

Answer 3

I'am using this Regex pattern ^[^~*\\\\|>:"?</"]*$ work fine

<input type="text" [(ngModel)] ="newReferenceValue"  #referencevar="ngModel" name="referencevar"  maxlength="{{textLengthValue}}" (keyup.enter)="save()" pattern='^[^~*\\|>:"?</"]*$' style="margin: 8px;width: 60%;">
 <div *ngIf="referencevar.errors?.pattern">
 Using ~*\|:"<>?/ reference value not applicabale  
 </div>