html - Why does my "oninvalid" attribute let the pattern fail?

Question

This little HTML5 password field works perfectly WITHOUT the oninvalid attribute (the pattern say: minimum 6 characters):

<form>
    <input type="password" name="user_password_new" pattern=".{6,}" required />      
    <input type="submit"  name="register" value="Register" />
</form>

See the jsFiddle here.

But when I add an oninvalid attribute that gives out a custom error message when user's input does not fit the pattern, the entire field NEVER becomes valid, see the code here:

<form>
    <input type="password" name="user_password_new" pattern=".{6,}" oninvalid="setCustomValidity('Minimum length is 6 characters')" required />      
    <input type="submit"  name="register" value="Register" />
</form>

See the jsFiddle here.

Can you spot the mistake ?

Answer 1

If you set a value with setCustomValidity() then the field is invalid. That is setting a non-zero length string causes the browser to consider the field invalid. In order to allow for the effects of any other validations you have to clear the custom validity:

<input type="password" name="user_password_new" pattern=".{6,}" required
   oninvalid="setCustomValidity('Minimum length is 6 characters')" 
   oninput="setCustomValidity('')" />