The navigator.registerProtocolHandler() method declares a site's ability to handle an address scheme (also known as a protocol). For example, an email site can register to open mailto: URLs or a VoIP site to open tel: URLs.

Learning resources on MDN

• Navigator: registerProtocolHandler() method
• Navigator: unregisterProtocolHandler() method

Browser support

• Chrome 13 Released on 2011-08-02
• Chrome Android ❌ See crbug.com/40964464
• Edge 79 Released on 2020-01-15
• Firefox 2 Released on 2006-10-24
• Firefox for Android 4 Released on 2011-03-29
• Safari ❌
• Safari on iOS ❌

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