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Comment by callahad | Hacker News Reader

Looks like the first hurdle is that it's relying on the deprecated document.registerElement API from an early draft of the Web Components specs, which prevents the app from booting in Firefox.

Edit: Paul Kinlan reports that Earth is using PNaCl (https://twitter.com/Paul_Kinlan/status/854351477506277378), which means it fundamentally can't run outside of Blink.

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> Paul Kinlan reports that Earth is using PNaCl (https://twitter.com/Paul_Kinlan/status/854351477506277378), which means it fundamentally can't run outside of Blink.

Reminds me of the good old days of ActiveX!

Just curious on why they would use PNaCl over WASM here? Wasn't WASM on track to becoming standard for native-speeds in the browser?

Timelines. WASM just shipped. I'm sure Earth has been working on this for years.

Probably because PNaCl is available now and was available two years ago when they say they started.

Earth uses Polymer, which works cross-platform using polyfills, so that's not what's making it Chrome-only. It's NaCl.

Either the polyfills aren't being shipped or their feature detection is broken, because I get "document.registerElement is not a function" in Firefox Nightly with a spoofed UA string, and I get marginally further if I turn on our experimental native support for Web Components: http://imgur.com/a/TgnrQ

The polyfills aren't being shipped, since Earth is using NaCl which is already Chrome-only.

Polymer's polyfills don't work very well, for what it's worth. Sometimes they get confused if things don't load from the network in the order they expect and start eating up gigabytes of RAM and all your CPU...

Can somebody fix Google's code? It's just Javascript, right?

It's just Javascript, but served from Google servers. For a fix to work for other users you'd need them to use a plugin that applies it.

At some point, it's using an API to get the map data. Is there anything that prevents non-Google hosted code from using that API?

Yes, rate-limits.

PNaCl is a binary executable format.

Is Google actually using that? That's IA-32 only. It won't run on ARM. What are they running on Chromebooks?

> Is Google actually using that? That's IA-32 only. It won't run on ARM.

Incorrect, PNaCl runs on both ARM and Intel.

NaCl (without the P) had to be separately compiled for different platforms, PNaCl is portable.

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