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                // BigBlueButton open source conferencing system - http://www.bigbluebutton.org/.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                //  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                // Copyright (c) 2018 BigBlueButton Inc. and by respective authors (see below).  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                //  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                // This program is free software; you can redistribute it and/or modify it under the  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                // terms of the GNU Lesser General Public License as published by the Free Software  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                // Foundation; either version 3.0 of the License, or (at your option) any later  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                // version.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                //  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                // BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                // PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                //  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                // You should have received a copy of the GNU Lesser General Public License along  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                // with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                $(document).on('turbolinks:load', function(){ | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                  $.rails.refreshCSRFTokens();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                })  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                document.addEventListener("turbolinks:before-cache", function() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                  $(".alert").remove() | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                })  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                // Gets the localized string  | 
            
            
                                                        
            
                                    
            
            
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                function getLocalizedString(key) { | 
            
            
                                                        
            
                                    
            
            
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                  var keyArr = key.split(".") | 
            
            
                                                        
            
                                    
            
            
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                  var translated = I18n  | 
            
                            
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                  // Search current language for the key  | 
            
            
                                                        
            
                                    
            
            
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                  keyArr.forEach(function(k) { | 
            
            
                                                        
            
                                    
            
            
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                    translated = translated[k]  | 
            
            
                                                        
            
                                    
            
            
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                  })  | 
            
            
                                                        
            
                                    
            
            
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                  // If key is not found, search the fallback language for the key  | 
            
            
                                                        
            
                                    
            
            
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                  if (translated == undefined) {  | 
            
                            
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                    translated = I18nFallback  | 
            
                            
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                    keyArr.forEach(function(k) { | 
            
            
                                                        
            
                                    
            
            
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                      translated = translated[k]  | 
            
            
                                                        
            
                                    
            
            
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                    })  | 
            
            
                                                        
            
                                    
            
            
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                  }  | 
            
            
                                                        
            
                                    
            
            
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                  return translated  | 
            
            
                                                        
            
                                    
            
            
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                    45
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                }  | 
            
            
                        
This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed.
To learn more about declaring variables in Javascript, see the MDN.