If I display a hidden button, based on a radio button selection, does it meet accessibility requirements?

1. When not to use radio buttons?
2. Should radio buttons have a default selection?
3. Which property of a radio button tells us if the user has selected the radio button?
4. Are radio buttons exclusive?

When not to use radio buttons?

By definition, radio buttons always have exactly one option selected, and you therefore shouldn't display them without a default selection.

Should radio buttons have a default selection?

Always Offer a Default Selection

In case of radio buttons this means that radio buttons should always have exactly one option pre-selected. Select the safest and most secure option (to prevent data loss).

Which property of a radio button tells us if the user has selected the radio button?

The checked property sets or returns the checked state of a radio button. This property reflects the HTML checked attribute.

Are radio buttons exclusive?

Radio buttons represent mutually exclusive selections, while checkboxes represent mutually inclusive ones. Both are commonly used together on forms to select options from a list.