nl_tokens: Merge the contents of two or more objects together into the first object . Similar to jQuery . extend / Object . assign . The main difference between this method is that declared properties with an <code > undefined< / code > value are not set to the target .
pl_tokens: function extend ( target ) { const sources = Array . prototype . slice . call ( arguments , 1 ) ; sources . forEach ( function ( source ) { if ( ! source ) { return ; } const keys = Object . <mask> ( source ) ; for ( let i = 0 ; i < keys . length ; i ++ ) { const key = keys [ i ] ; const value = source [ key ] ; if ( value === undefined ) { continue ; } target [ key ] = value ; } } ) ; return target ; }