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travis-ci

<a href="https://github.com/infernojs/inferno/commit/<a class=hub.com/infernojs/inferno/commit/d02007c9569e9b4e7412026da0b7cec6d23299dc">d02007c95<a href="https://github.com/infernojs/inferno/commit/d02007c9569e9b4e7412026da0b7cec6d23299dc">&quot;&gt;&amp;quot;Node&amp;quot; is undefined on IE8 (#1491)

Browser simply fails to initialize the script because Node is undefined on IE8.

The exact spot where it fails is here:
https://github.com/infernojs/inferno/blob/</a><a class="double-link" href="https://github.com/infernojs/inferno/commit/<a class="double-link" href="https://github.com/infernojs/inferno/commit/f0d010daee5010545a3016078d1503e30511885b">f0d010dae</a>">f0d010dae</a><a href="https://github.com/infernojs/inferno/commit/d02007c9569e9b4e7412026da0b7cec6d23299dc">/packages/inferno/src/DOM/rendering.ts#L28-L29

**Expected Current Behaviour**

This spot has to be enclosed into if clause, checking for undefined, like this:

```js
if (window.Node) {
  (Node.prototype as any).$EV = null;
  (Node.prototype as any).$V = null;
}
```

**Inferno Metadata**

Confirmed on:

- IE 8 / Windows 7
- IE 8 / Linux/Wine / BYOND 512.x (because that's where we are trying to roll Inferno).

2318 of 2684 branches covered (86.36%)

3559 of 3744 relevant lines covered (95.06%)

1666.48 hits per line