Amphtml: Null reference error in Internet Explorer 10

[sryze]

What's the issue?

When I open my AMP page in Internet Explorer 10 it doesn't fully load because of:

SCRIPT5007: Unable to get property 'prototype' of undefined or null reference 
v0.js, line 477 character 390

How do we reproduce the issue?

1. Use code from the Hello World example
2. Put it in hello-world.html
3. Run a web-server (e.g. php -S 0.0.0.0:9000 from same directory)
4. Open http://localhost:9000/hello-world.html in IE 10

What browsers are affected?

Internet Explorer 10 and probably 9. It's working fine in IE 11.

Which AMP version is affected?

1519771395920

[Adventive]

Just as a note:

In general we support the latest two versions of major browsers like Chrome, Firefox, Edge, Safari and Opera.
see supported browsers

[sryze]

Yeah, I saw that after creating the issue. I made a PR that seems to fix this, at least the page mostly loads with it: https://github.com/ampproject/amphtml/pull/13779.

[nainar]

Hi @sryze! Thank you so much for sending through the PR. I have assigned the issue to you and will take a look at the PR inline.

Also @Adventive is right - support for browsers like IE10 - is best effort but since the fix and the issue aren't adding security issues and low risk - we are happy to accept the PR. :)