javascript - Detached radio inputs dont synchronize checkedness? -

is bug or missing something?

i create radio inputs detached document, , check them both. expect second stay checked, both stay checked:

var container = document.createelement('div'); container.innerhtml =      '<input type="radio" name="tiny" value="elephants">' +     '<input type="radio" name="tiny" value="robots">';  var radios = container.queryselectorall('[name=tiny]');  // select one, other while detached radios[0].checked = true; radios[1].checked = true;  console.log(radios[0].checked); // true console.log(radios[1].checked); // true 

if attached same container document, exclusive checkedness enforced:

document.body.appendchild(container);  radios[0].checked = true; radios[1].checked = true;  console.log(radios[0].checked); // false console.log(radios[1].checked); // true 

seems me these radios meet the spec's definition of single radio button group. if switch containing element form, checkedness synchronized while detached. i've checked in chrome 25 far.