Error: SyntaxError: DOM Exception 12 on Tag Creation Using jQuery

I have the following javascript:

var orderItemQuantity = $('<input/>', {
    type: 'hidden',
    name: 'order_detail[][quantity]',
    value: itemQuantity
});

The above javascript throws the following error message:

Error: SyntaxError: DOM Exception 12

This one works without error:

var newListItem = $('<li/>', {
    html:
    $('#item_name_'+itemId).text() +
    '(' + $('#item_quantity_' + itemId).val() +')' +
    '<a onclick="removeItem(' + itemId + ')">Delete this</a>' +
    '<input type="hidden" name="order_detail[][item_id]" value="' + itemId + '"/>',
    id: itemId
});

I checked the following question but the answer did not specify clearly the correct reason WHY.

Here is my DTD:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

Question: Why does $('<input/>') and $('<input>') throw the said exception while $('<li/>') is not a problem?

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