nl_tokens: Bind once - only event handler
pl_tokens: function once ( element ) { var _this2 = this ; var events = arguments . length > 1 && arguments [ 1 ] !== undefined ? arguments [ 1 ] : '' ; var callback = arguments . length > 2 ? arguments [ 2 ] : undefined ; var passive = arguments . length > 3 && arguments [ 3 ] !== undefined ? arguments [ 3 ] : true ; var capture = arguments . length > 4 && arguments [ 4 ] !== undefined ? arguments [ 4 ] : false ; var onceCallback = function onceCallback ( ) { off ( element , <mask> , onceCallback , passive , capture ) ; for ( var _len = arguments . length , args = new Array ( _len ) , _key = 0 ; _key < _len ; _key ++ ) { args [ _key ] = arguments [ _key ] ; } callback . apply ( _this2 , args ) ; } ; toggleListener . call ( this , element , events , onceCallback , true , passive , capture ) ; }