nl_tokens: executes when element attached to Dom
pl_tokens: function onDOMAttached ( el ) { var _this2 = this ; var handlers = [ ] , attached = false , _step = undefined ; if ( el . el !== undefined ) { _step = function step ( ) { if ( attached ) { while ( handlers . length > 0 ) { handlers . shift ( ) ( ) ; } } else { window . requestAnimationFrame ( _step ) ; if ( document . body . contains ( el . el ) ) { attached = true ; } } } ; } return { then : function then ( cb , <mask> ) { handlers . push ( cb . bind ( context || _this2 ) ) ; window . requestAnimationFrame ( _step ) ; } } ; }