webpack-example/node_modules/panzoom/index.js
// IE 11 does not support isNaN:
IE 11 does not support isNaN.
IE 11 does not support isNaN .
function isNaN(value) {
  if (Number.isNaN) {
    return Number.isNaN(value);
  }
  return value !== value;
}
function isNaN ( value ) { if ( Number . isNaN ) { return Number . isNaN ( value ) ; } return value !== value ; }
IE 11 does not support isNaN:
IE 11 does not support isNaN :