It's very much still alive, it recently got added to Edge for example: https://caniuse.com/#feat=ping https://caniuse.com/#feat=ping It got removed from the W3

It's very much still alive, it recently got added to Edge for example: https://caniuse.com/#feat=ping https://caniuse.com/#feat=ping It got removed from the W3C spec, but it's still in WHATWG which is generally considered the canonical spec anyway.