Navigator: unregisterProtocolHandler() method
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The Navigator
method unregisterProtocolHandler()
removes a protocol handler for a given URL scheme.
This method is the inverse of registerProtocolHandler()
.
Syntax
js
unregisterProtocolHandler(scheme, url)
Parameters
scheme
-
A string containing the permitted scheme in the protocol handler that will be unregistered. For example, you can unregister the handler for SMS text message links by passing the
"sms"
scheme. url
-
A string containing the URL of the handler. This URL should match the one that was used to register the handler (e.g. it must include
%s
).
Return value
None (undefined
).
Exceptions
SecurityError
DOMException
-
The user agent blocked unregistration. This might happen if:
- The scheme (protocol) is invalid, such as a scheme the browser handles itself (
https:
,about:
, etc.) - The handler URL's origin does not match the origin of the page calling this API.
- The browser requires that this function is called from a secure context.
- The browser requires that the handler's URL be over HTTPS.
- The scheme (protocol) is invalid, such as a scheme the browser handles itself (
SyntaxError
DOMException
-
The
%s
placeholder is missing from the handler URL.
Permitted schemes
For security reasons, unregisterProtocolHandler()
restricts which schemes can be unregistered.
A custom scheme may be unregistered as long as:
- The custom scheme's name begins with
web+
- The custom scheme's name includes at least 1 letter after the
web+
prefix - The custom scheme has only lowercase ASCII letters in its name.
For example, web+burger
, as shown in the Example below.
Otherwise, the scheme must be one of the following:
bitcoin
ftp
ftps
geo
im
irc
ircs
magnet
mailto
matrix
mms
news
nntp
openpgp4fpr
sftp
sip
sms
smsto
ssh
tel
urn
webcal
wtai
xmpp
Examples
If your site is burgers.example.com
, and you have a web+burger:
scheme, you can unregister the handler for it like so:
js
navigator.unregisterProtocolHandler(
"web+burger",
"https://burgers.example.com/?burger=%s"
);
This script must be run from the same origin as the handler URL (so any page at https://burgers.example.com
), and the handler URL must be http
or https
.
Specifications
Specification |
---|
HTML Standard # dom-navigator-unregisterprotocolhandler-dev |
Browser compatibility
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