Compile Javascript

• Check that you have the last version of Node and NPM
• Install the required npm modules:

npm install --save-dev
npm install uglify --save-dev

• To compile, run:

npm run build

• Comment everything out in _js/src/images.js
• In _config.yml, replace

  replace_img:
  re_img:              <img\s*(?<attrs>.*?)\s*/>
  re_ignore:           (re|data)-ignore
  replacement:         |
    <hy-img root-margin="512px" %{attrs}>
      <noscript><img data-ignore %{attrs}/></noscript>
      <span slot="loading" class="loading"><span class="icon-cog"></span></span>
    </hy-img>
  

by

replace_img:
  re_img:              <img\s*(?<attrs>.*?)\s*/>
  re_ignore:           (re|data)-ignore
  replacement:         |
    <hy-img root-margin="512px" %{attrs}><img %{attrs}></hy-img>