Feature	Involved component	Mandatory/ optional	End-user manageable
CORS	Client	Mandatory	No
postMessage (XDM)	Helper and Client	Mandatory	No
Cookies (clientID)	csfe-js	Optional	Browser setting
Cookies (merchant)	Client and merchant	Optional	Browser setting
CSP	csfe-js	Optional	No
cryptoAPI	Client	Optional	No
WebView	Client	Optional	No
Touch-screen	Client	Optional	No
CSS3	Client	Optional	No
SVG	Client	Mandatory	No
JSON	Helper and Client	Mandatory	No
object.keys	Helper and Client	Mandatory	No
queryselector	Client	Mandatory	No
element.OuterHTML	Helper and Client	Mandatory	No
Secure form elements	Client	Optional	No
ShadowDOM	Client	Optional	No
Mutation observer	Client	Optional	No

Table 18 – Web features used by the BankID Web-client

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