docs: function () {
      // 90度为横屏
      return (EVT_ORIENTATION_CHANGE === ORIENTATION_CHANGE) ? {
        landscape: (window.orientation === 90 || window.orientation === -90),
        portrait: (window.orientation === 0 || window.orientation === -180),
        orientation: window.orientation
      } : {
        landscape: window.screen.width > window.screen.height,
        portrait: window.screen.width <= window.screen.height,
        orientation: window.screen.width > window.screen.height ? 90 : 0
      }
    }