realm-chain.js

class MyChain {
   setFoo() {
      // I am the first one. And i set this.foo = "foo1"
      return "foo1";
   }
   setBar() {
      // I am the second one, and i have "this.foo" at my disposal
      // And i set this.bar = "bar1"
      return "bar1";
   }
   justSomethingFunky()
   {
     // I am the third one, and everyone will wait for me
     let self = this;
     return new Promise(function(resolve, reject){
        // But i will not assign anything
        // Just have to resolve myself
        return resolve(self.bar)
     })
   }
   setHello()
   {
      // I am the last to be executed, and i will assign this.hello = "world"
      return "world";
   }
}
realm.chain(MyChain).then(function(result){
   // {foo : "foo1", bar : "bar1", hello: "world" }   
});