Justin Douglas tabidots

## promises-cljs.md

      
        
          
            
              
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                pesterhazy
                / promises-cljs.md
            
            
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              October 10, 2023 18:09
            
              
                Promises in ClojureScript
              
          
        
      
        
  
      
    Chaining promises

Chaining promises in ClojureScript is best done using the thread-first macro, ->. Here's an example of using the fetch API:
(-> (js/fetch "/data")
    (.then (fn [r]
             (when-not (.-ok r)
               (throw (js/Error. "Could not fetch /data")))
             (.json r)))