If you like to keep it terse, it's perfectly fine not to quote attribute values. The HTML5 spec[1] says: The attribute value can remain unquoted if it doesn't

If you like to keep it terse, it's perfectly fine not to quote attribute values. The HTML5 spec[1] says: The attribute value can remain unquoted if it doesn't contain space characters or any of " ' ` = < > [1] http://www.w3.org/TR/html5/introduction.html#a-quick-introduction-to-html http://www.w3.org/TR/html5/introduction.html#a-quick-introdu...