0 Not supported in HTML5.
Specifies whether or not to display a border around an <iframe>
height pixels Specifies the height of an <iframe>
longdesc URL Not supported in HTML5.
Specifies a page that contains a long description of the content of an <iframe>
marginheight pixels Not supported in HTML5.
Specifies the top and bottom margins of the content of an <iframe>
marginwidth pixels Not supported in HTML5.
Specifies the left and right margins of the content of an <iframe>
name text Specifies the name of an <iframe>
sandbox allow-forms
allow-pointer-lock
allow-popups
allow-same-origin
allow-scripts
allow-top-navigation Enables an extra set of restrictions for th
