nl_tokens: Generate a mapping of standard vendor prefixes using the defined style property and event name .
pl_tokens: function makePrefixMap ( styleProp , eventName ) { <mask> prefixes = { } ; prefixes [ styleProp . toLowerCase ( ) ] = eventName . toLowerCase ( ) ; prefixes [ 'Webkit' + styleProp ] = 'webkit' + eventName ; prefixes [ 'Moz' + styleProp ] = 'moz' + eventName ; return prefixes ; }