src/util/event.js
// the original value, if there are no handlers).
the original value, if there are no handlers).
the original value if there are no handlers ) .
signalPipelined(type, value) {
    let arr = this._handlers && this._handlers[type]
    if (arr) for (let i = 0; i < arr.length; ++i)
      value = arr[i](value)
    return value
  }
signalPipelined ( type , value ) { let arr = this . _handlers && this . _handlers [ type ] if ( arr ) for ( let i = 0 ; i < arr . length ; ++ i ) value = arr [ i ] ( value ) return value }
the original value, if there are no handlers).
the original value if there are no handlers ) .