Purgecss should not remove html style

[edwardanthony]

Version: 1.4.0 Platform: MacOS 10.13.6

How to reproduce

Note: Please notice the difference between "purecss" and "purgecss" as it looks similar.

1. Install purecss library

   npm install purecss --save

2. Add component.js

   export default (text = 'Hello world') => {
   const element = document.createElement('div');
   
   element.className = 'pure-button';
   element.innerHTML = text;
   
   return element;
   };

3. Add this in index.js entry point.

   
   import 'purecss';
   import './main.scss';

import component from './component';

document.body.appendChild(component());

### Purgecss wil purge the css, including the html style.
Below you could see the html style that is removed by Purgecss.

html { font-family: sans-serif; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; }

Because html style is removed, the font will look different after purging.

[ghost]

Happened to me too. For some reason deletes all htmltag styles, and I solved it adding the following option:

whitelist: ['html']