Web Capabilities and Guards

	A	B	C	D	E	F	G	H	I	J	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y	Z	AA	AB
1	go/web-capability-guards								Interaction			Permission								Frames				Lifecycle
2	Also see the Legend sheet	No guard	Disallowed	Notes, if any	Async API	Secure Context	CORS	CSP allows	Historic activation	User activation	Site engagement	Default-allowed Content setting	Tab right-click to disable	Forgiveness	Yes-only	Accept via page action	Boolean	Per-device	Chooser	Top only	Same origin as top	Feature Policy	Not sandboxed	Focused tab	Visible tab	non-Stopped tab	Tab (vs SW)

3	beforeunload dialogs								✅
4	Vibrate					TODO?			✅													TODO					✅
5	history.pushState()								TODO
6	HTML parsing	✅																									✅
7	Receive keyboard input																							✅
8	Receive mouse input																								✅
9	Save cookies											✅
10	Load images							✅				✅
11	Run Javascript							✅				✅
12	Access to cross-origin fetch() bodies				✅		✅
13	Iframe navigates top frame									\|✅											✅		✅
14	Navigator.share()									✅
15	open() new window									✅						✅
16	Download									?													TODO?
17	Disable form autocomplete		✅
18	Use >X% of CPU			In a tab as opposed to a service worker																				TODO?
19	Navigate to unknown-scheme: URLs			This can call out to native applications. I believe browsers ask permission for each scheme rather than each caller.													✅
20	Handle myscheme: URLs					TODO?										✅
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22	Client TLS certificate																		✅
23	Load active mixed content		✅
24	Load passive mixed content
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26	Modal dialogs (alert(), prompt(), etc.)			TODO: These should be modal on the tab.																				TODO?
27	Autoplay video with sound									✅																	✅
28	Autoplay sound									\|✅?											\|✅						✅
29
30	Remote Playback					?				✅									✅
31	Presentation API					✅				✅
32	WebVR: non-exclusive mode					✅
33	WebVR: exclusive mode					✅				✅
34
35	CSS styling	✅																									✅
36	CSS animations	✅																									✅
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38	Service Worker registration				✅	✅
39	Service Worker fetch handling					✅
40	Service Worker: Background execution			Via scheduled backgroundsync or silent push messages		✅					✅
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42	Geolocation				✅	✅											✅					TODO					✅
43	Persistent Storage				✅	✅											✅
44	Bluetooth				✅	✅				✅								✅	✅		✅	TODO					✅
45	USB				✅	✅				✅								✅	✅		?						✅
46	NFC					✅																		✅			✅
47	Play audio												✅									TODO					✅
48	Audio output selection			TODO: ->
49	Microphone getUserMedia				✅	✅											✅	TODO?	TODO?			TODO					✅
50	Camera getUserMedia				✅	✅											✅	TODO?	TODO?			TODO					✅
51	Screen capture			TODO: ->
52	Mic/camera enumeration			TODO: ->
53	Sensor: Accelerometer			There's a possibility of doing low resolution without a guard...		✅											?			?	?	?		?			✅
54	Sensor: Gyroscope					✅											?			?	?	?		?			✅
55	Sensor: Magnetometer					✅											?			?	?	?		?			✅
56	Sensor: Ambient light					✅											?			?	?	?		?			✅
57	Midi	✅			✅	?																TODO					✅
58	Midi sysex				✅	?											✅										✅
59	EME				✅	✅											✅					TODO					✅
60	Push messages				✅	✅				\|TODO?	\|TODO?						✅
61	Notifications				✅	✅				\|TODO?	\|TODO?						✅
62	Fullscreen			Allowed by default, but tells the user that it's happened, and the user can cancel		?				✅				✅								TODO					✅
63	Payment Request					✅				✅									✅			TODO					✅
64	Clipboard, read, synchronous									✅
65	Clipboard, write, synchronous									✅		✅
66	Clipboard, read, asynchronous			Proposal: Allowed with gesture for system UI elements; No gesture required if full/read permission granted.	✅	✅				sometimes
67	Clipboard, write, asynchronous			Proposal: Allowed by default with gesture; No gesture required if full Permission is granted	✅	✅				sometimes		✅					\|✅
68
69	Advertise security key support					✅									✅												✅
70	Receive accessibility events														✅												✅
71	Drag/drop									✅?
72	File upload																		✅
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