This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The preventSilentAccess() method of the CredentialsContainer interface sets a flag that specifies whether automatic log in is allowed for future visits to the current origin, then returns an empty PromiseFor example, you might call this, after a user signs out of a website to ensure that he/she isn't automatically signed in on the next site visit. Mediation varies by origin, and is an added check point of browser stored credentials, informing a user of an account login status. This method is typically called after a user signs out of a website, ensuring this user's login information is not automatically passed on the next site visit.

Earlier versions of the spec called this method requireUserMediation(). See Browser compatibility for support details.


var Promise = CredentialsContainer.preventSilentAccess()




An empty Promise.


Specification Status Comment
Credential Management Level 1
The definition of 'preventSilentAccess()' in that specification.
Working Draft Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support


51 — 601

? ? ? No ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support


51 — 601


51 — 601

? ? No ? ?

1. Supported as requireUserMediation.

Document Tags and Contributors

Contributors to this page: fscholz, jpmedley, david_ross
Last updated by: fscholz,