This might be a reference to this one: https://github.com/facebook/react/issues/10212#issuecomment-346302374

The problem still exist.

So, trying to render with server side and got this error. I don't have this notation in my code but this might be a problem with dependencies.

```
TypeError: Cannot read property 'toLowerCase' of undefined
    at ReactDOMServerRenderer.renderDOM (/Users/lukasborawski/Dev/web-client/node_modules/react-dom/cjs/react-dom-server.node.development.js:2304:27)
...
```

```
"react": "^16.1.1",
"react-dom": "^16.2.0",
```

Thx for help.
let serialized = '';
  let delimiter = '';
  for (const styleName in styles) {
    if (!styles.hasOwnProperty(styleName)) {
      continue;
    }
    const isCustomProperty = styleName.indexOf('--') === 0;
    const styleValue = styles[styleName];
    if (__DEV__) {
      if (!isCustomProperty) {
        warnValidStyle(styleName, styleValue, getStackAddendum);
      }
    }
    if (styleValue != null) {
      serialized += delimiter + processStyleName(styleName) + ':';
      serialized += dangerousStyleValue(
        styleName,
        styleValue,
        isCustomProperty,
      );
      delimiter = ';';
    }
  }
  return serialized || null;
}
function warnNoop(