I have this Angular 2 form:
<input #myInput="ngModel" [(ngModel)]="myobj.myInput" required min="0" type="number" /> <p>valid: {{myInput.valid}}</p> When I enter "10" it is valid and when I enter "" it's invalid, but when I put "-10" it is still valid.
Because min isn't an option for FormsModule validation. The available validators are required, minlength, maxlength and pattern; an empty input is invalid because you have required. The min attribute prevents the HTML input from decrementing below zero using the arrow keys or the up-down buttons in the input, but isn't used for validation; you could write a custom validator to do this.
Note that there is an issue on GitHub discussing support for the HTML 5 validators; the fact that it's currently closed doesn't bode well for min and max getting included in the near future.
