SyncManager
        
        
          Limited availability
        
        
        
          
                
              
                
              
                
              
        
        
      
      This feature is not Baseline because it does not work in some of the most widely-used browsers.
Note: This feature is available in Web Workers.
The SyncManager interface of the Background Synchronization API provides an interface for registering and listing sync registrations.
Instance properties
None.
Instance methods
SyncManager.register()- 
Create a new sync registration and return a
Promise. - 
Return a list of developer-defined identifiers for
SyncManagerregistrations. 
Specifications
| Specification | 
|---|
| Web Background Synchronization> # sync-manager-interface>  | 
            
Browser compatibility
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