Feature-Policy - HTTP
when this policy is disabled, the promise returned by navigator.getbattery() will reject with a notallowederror domexception.
...when this policy is disabled, the promise returned by getusermedia() will reject with a notallowederror domexception.
...when this policy is disabled, the promise returned by getdisplaymedia() will reject with a notallowederror if permission is not obtained to capture the display's contents.
...when this policy is disabled, the promise returned by mediadevices.getusermedia() will reject with a notallowederror.

DOMException - Web APIs
notallowederror the request is not allowed by the user agent or the platform in the current context, possibly because the user denied permission (no legacy code value and constant name).
...adds the notreadableerror, unknownerror, constrainterror, dataerror, transactioninactiveerror, readonlyerror, versionerror, operationerror, and notallowederror values.

HTMLMediaElement.play() - Web APIs
possible errors include: notallowederror the user agent (browser) or operating system doesn't allow playback of media in the current context or situation.
... if the user agent is configured not to allow automatic or script-initiated playback of media, calling play() will cause the returned promise to be immediately rejected with a notallowederror.

MediaDevices.getUserMedia() - Web APIs
if the user denies permission, or matching media is not available, then the promise is rejected with notallowederror or notfounderror respectively.
... notallowederror one or more of the requested source devices cannot be used at this time.

Index - HTTP
when this policy is enabled, the promise returned by mediadevices.getusermedia() will reject with a notallowederror.
...when this policy is enabled, the promise returned by mediadevices.getusermedia() will reject with a notallowederror.

HTTP Index - HTTP
when this policy is enabled, the promise returned by mediadevices.getusermedia() will reject with a notallowederror.
...when this policy is enabled, the promise returned by mediadevices.getusermedia() will reject with a notallowederror.

Autoplay guide for media and Web Audio APIs - Web media technologies
}).catch(error => { if (error.name === "notallowederror") { showplaybutton(videoelem); } else { // handle a load or playback error } }); } the first thing we do with the result of play() is make sure it's not undefined.
...this looks at the error's name to see if it's notallowederror.

MediaDevices.getDisplayMedia() - Web APIs
notallowederror permission to access a screen area was denied by the user, or the current browsing instance is not permitted access to screen sharing.

NDEFReader.scan() - Web APIs
notallowederror the permission for this operation was rejected.

NDEFWriter.write() - Web APIs
notallowederror the permission for this operation was rejected or overwrite is false and there are already records on the tag.

Navigator.getBattery() - Web APIs
notallowederror note: no user agent currently throws this exception, but the specification describes the following behaviors: this document is not allowed to use this feature.

PublicKeyCredentialRequestOptions.allowCredentials - Web APIs
if the authenticator does not contain any of these public key credentials, the client will throw a domexception "notallowederror".

Sensor APIs - Web APIs
if (event.error.name === 'notallowederror') { // branch to code for requesting permission.

WakeLock.request() - Web APIs
exceptions notallowederror thrown when wake lock is not available, which can happen because: document is not allowed to use screen wake lock due to screen-wake-lock policy.

Feature-Policy: camera - HTTP
when this policy is enabled, the promise returned by mediadevices.getusermedia() will reject with a notallowederror.