Reaction is not triggering When listening to a local observable. about mobx

[mweststrate]

The problem is that you create the localStoreReaction before you create this.localStore, which is why you get a runtime error that highlights this. (You should have seen this in your console?)

Anyway your solution in code was already roughly right, you should initialize the reaction after the store, so just uncommenting and calling

 localStoreReactionInitialize () {
      this.localStoreReaction = reaction(
        () => this.localStore.api1Loading,
         (api1Loading) => {
           console.log("localStoreReaction:>>>>", api1Loading);
         }
       );
     };

Fixes the issue. (I made it a normal method as I have no clue why that was defined as a field containing an arrow function)