Tips for validating dates in Angular 4

Recently, I have started working with Angular and in my application I am facing a challenge regarding date validation. I need to validate a date input and display an error message based on the validation criteria.

To achieve this, I am utilizing ngx-bootstrap datepicker component in my HTML code:

<label for="mDOB" class="control-label">Date of birth</label>
            <input [bsConfig]="bsConfig"  type="text" maxlength="10" name="mDOB" [(ngModel)]="mUser.mDOB" #mDOB="ngModel"
              placeholder="Date of birth" class="form-control" bsDatepicker required>
            <div class="help-block alert-danger col-sm-12" *ngIf="mDOB.errors?.required && mDOB.touched">
              * Date of Birth is required
            </div>

I have successfully implemented the required field validation, but now I face the next task - validating the date field to accept only numbers in the format "mm/dd/yyyy". In my app.component.ts file, I need assistance in converting the default date format (2018-06-11T18:30:00.000Z) to the desired format.

If anyone has a solution or suggestions on how to accomplish this task, your help would be greatly appreciated.

Answer №1

What kind of date validation are you looking for? Just ensuring that the input is a valid date? If you designate the sort="date" attribute on the input element, the browser will automatically ensure that only a valid date is entered.

This also applies to range validators and currency validators. By setting the type="number" on the input field, a validator may not even be necessary.

If you prefer to handle your own validation, regular expressions can be used, similar to the examples provided.

You can search for regular expressions specifically designed for currency and date formats. For example, when it comes to validating dates, you might find something like this helpful: JavaScript - regex to validate date format

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