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// on refresh handler
function refresher (e) {
  alert('refresh handler fires')
}

// default options
var config = {
  contain           : $('.ptr-wrapper'),
  header            : $('.ptr-wrapper .ptr'),
  content           : $('.ptr-wrapper .content'),
  distanceToRefresh : 50,
  // EN: 'pull to refresh'
  pullDownText      : '下拉刷新',
  // EN: 'release to refresh'
  releaseText       : '释放刷新',
  // EN: 'loading'
  refreshText       : '正在更新',
  refresher         : refresher
};

// new 
var ptr = new PTR(config);