UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36

Example URL:

Steps to reproduce the problem:
1. Load a page with an HTML form that includes radio buttons with the "required" attribute, and client-side validation enabled.
2. Remove the "required" attribute for each radio button by manipulating the DOM, either with the developer tools or with JavaScript on the page itself.
3. Attempt to submit the form without setting a value for the radio buttons.

What is the expected behavior?
The form should happily submit, because the radio buttons are no longer required. This is consistent with how other input elements behave.

What went wrong?
Instead, the form does not submit. Chrome requires that I select an option for the radio inputs.

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? Yes I am unsure which version, but it would have been around three months ago

Does this work in other browsers? N/A 

Chrome version: 49.0.2623.87  Channel: stable
OS Version: Fedora 23
Flash Version: Shockwave Flash 21.0 r0

I am attaching a minimal test case which should reproduce the problem. Note that Firefox 45.0 exhibits the correct behaviour. My example form has two radio inputs and a text input which are all initially marked as required, but the "required" attribute is removed immediately after the page loads. Note that the validator only complains about the radio inputs - not the text input.

This problem does not appear to happen in reverse, when I add the required attribute on page load.
 

Deleted: form-error.html 1.4 KB

form-error.html 1.4 KB View Download