JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app="myApp"  ng-controller="startCtrl">
        
    
</div>

JavaScript

var app=angular.module("myApp",[]);

app.factory("firstService",function(){
      return{
        myFunction:function()
        {
            
            var myVar="Hello from service one";
    
            return myVar;
        }
    }

});

  

app.factory("secondService",function(firstService){
      return{
        callToFirstService:function()
        {
            debugger;
            var result=firstService.myFunction();
    
            return result;
        }
    }

});


app.controller("startCtrl",function($scope,secondService){
  debugger;
   var finalResult= secondService.callToFirstService();
    console.log(finalResult);
});