loaders: [
          {
              test: /\.js$/,
              loader: 'babel-loader',
              exclude: [/node_modules/],
              query: {
                  presets: ['es2015', 'react']
              }
          }
]

ul = document.getElementsByClassName('play-team__list')[0];

ul = document.getElementsByClassName('play-team__list');

for(var key in this)
console.log(key + ": " + this[key]);