Use built-in form validation

<Component name="Test">

<Form
  data="{{ password: '' }}"
  onSubmit="(data) => console.log('Submitted:', data)"
>
  <FormItem
    label="Password"
    bindTo="password"
    type="password"
    minLength="8"
    lengthInvalidMessage="Password must be at least 8 characters"
  />
</Form>

</Component>