How to get return value on eos blockchain , when I use the eosjs

[dksuper]

How to get return value on eos blockchain , when I use the eosjs?

Here is my contract:

and it was already set in my eos private blockchain.

Then I use the eosjs to trigger this contract:

When I trigger it , I can saw the log , show in my eos private blockchain:

But why I only get this return value , not "Hello, batman"?

Did I do something wrong?

I will very appreciate ,that you can give me the advice.

[taokayan]

I think there's no explicit return values. You need to get the transaction id and block number and wait until it become irreversible or dropped by all the BPs.