Text nodes can't accept properties in IE8

Hi guys!

First of all, thanks for you work, this library is awesome!

I know that IE8 is not officialy supported, but i have to and in your ‘Browser support’ page you say:

It should work fine in IE7 and IE8

I’ve fixed it locally with this patch:

let supportsAddTextNodeProps;

try {
  document.createTextNode('').test = true;
  supportsAddTextNodeProps = true;
} catch (e) {
  supportsAddTextNodeProps = false;
}

function getEmptyVNode() {
  if (!supportsAddTextNodeProps) {
    return document.createElement('p-empty');
  }

  return '';
}

// empty values (null & undefined) render as empty Text nodes
if (vnode==null) vnode = getEmptyVNode();

So, can we fix it? Or at least, can you remove "It should work fine in IE7 and IE8"?

[gdorsi]

I’ve rapidly made the fix here

If it’s ok tomorrow i’ll do the PR.

Thanks for the support 😃

[developit]

Anyone looking for a workaround, here’s how to get Preact working (reasonably enough) in IE7 and IE8:

document.createTextNode = function(data) {
  var text = document.createElement('x-text')
  text.innerText = data
  return text
}

This fixes the text node properties issue. It causes text nodes to be recreated on every render, but that’s the price we pay 😃