simplestore_operations.js

mystore.store("books")
       .add([{book_name:"Eloquent JavaScript"},{book_name:"You don't know JS"}])
       .store("users")
       .add({name:"javascript"})
       .then(()=> mystore.store("books").get({book_name:"Eloquent JavaScript"}) ) 
       .then(res=>{
                console.log(res.books); //The final result        
            }) 
       .catch(()=>{
                console.log("transaction failed");
            })