nl_tokens: Load individual file .
pl_tokens: function loadFile ( path , callbackFn , args , numTries ) { var doc = document , async = args . async , maxTries = ( args . numRetries || 0 ) + 1 , beforeCallbackFn = args . before || devnull , pathStripped = <mask> . replace ( / ^(css|img)! / , '' ) , isLegacyIECss , e ; numTries = numTries || 0 ; if ( / (^css!|\.css$) / . test ( path ) ) { // css e = doc . createElement ( 'link' ) ; e . rel = 'stylesheet' ; e . href = pathStripped ; // tag IE9+ isLegacyIECss = 'hideFocus' in e ; // use preload in IE Edge (to detect load errors) if ( isLegacyIECss && e . relList ) { isLegacyIECss = 0 ; e . rel = 'preload' ; e . as = 'style' ; } } else if ( / (^img!|\.(png|gif|jpg|svg)$) / . test ( path ) ) { // image e = doc . createElement ( 'img' ) ; e . src = pathStripped ; } else { // javascript e = doc . createElement ( 'script' ) ; e . src = path ; e . async = async === undefined ? true : async ; } e . onload = e . onerror = e . onbeforeload = function ( ev ) { var result = ev . type [ 0 ] ; // treat empty stylesheets as failures to get around lack of onerror // support in IE9-11 if ( isLegacyIECss ) { try { if ( ! e . sheet . cssText . length ) result = 'e' ; } catch ( x ) { // sheets objects created from load errors don't allow access to // `cssText` (unless error is Code:18 SecurityError) if ( x . code != 18 ) result = 'e' ; } } // handle retries in case of load failure if ( result == 'e' ) { // increment counter numTries += 1 ; // exit function and try again if ( numTries < maxTries ) { return loadFile ( path , callbackFn , args , numTries ) ; } } else if ( e . rel == 'preload' && e . as == 'style' ) { // activate preloaded stylesheets return e . rel = 'stylesheet' ; // jshint ignore:line } // execute callback callbackFn ( path , result , ev . defaultPrevented ) ; } ; // add to document (unless callback returns `false`) if ( beforeCallbackFn ( path , e ) !== false ) doc . head . appendChild ( e ) ; }