amp html - Detecting Valid Input on amp-form -


is there event enables detect when input has been updated?

the closest have managed below detects value has changed , not check whether valid input. i'm using amp-bind enable navigation button guide user through form.

the objective make sure user cannot proceed until there valid entry in each input.

<input  type="text"  id="postcode"  name="postcode"  placeholder="postcode"  pattern="[a-za-z]{1,2}[0-9rr][0-9a-za-z]? [0-9][abd-hjlnp-uw-zabd-hjlnp-uw-z]{2}"  on="change:amp.setstate({mainapplication: {postcode: event.value}})"  class="user-invalid valuemissing"  aria-invalid="true"  required>    <button  id="nextsection-2"  type="button"  class="button large alert"  on="tap:apply-section-2.show,apply-section-1.hide" [disabled]="!mainapplication.ownerstatus || !mainapplication.postcode || !mainapplication.housenumber"  disabled>  next  </button>

the closest thing found this issue, may want explain case there check if it's same issue.


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