Getting Gmail to handle all mailto: links with registerProtocolHandler

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Thu Apr 15 2021 11:44:34 GMT+0000 (Coordinated Universal Time)

Saved by @Rajasekhar 

navigator.registerProtocolHandler("mailto",
                                  "https://mail.google.com/mail/?extsrc=mailto&url=%s",
                                  "Gmail");
content_copyCOPY

https://developers.google.com/web/updates/2012/02/Getting-Gmail-to-handle-all-mailto-links-with-registerProtocolHandler