Window: isSecureContext property
        
        
          
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                  Widely available
                
                
              
        
        
        
          
                
              
                
              
                
              
        
        
      
      This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2018.
The isSecureContext read-only property of the Window interface returns a boolean indicating whether the current context is secure (true) or not (false).
Value
A boolean.
Specifications
| Specification | 
|---|
| HTML> # dom-issecurecontext-dev>  | 
            
Browser compatibility
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