1-test_playbook.yml

---
- name: Node test
  hosts: localhost
  gather_facts: False

  tasks:
    - debug:
        var: titi

2-test_node_script.js

var Ansible = require('node-ansible')

var command = new Ansible.Playbook().playbook('test');
command.on('stdout', function(data) { console.log(data.toString()); });
command.on('stderr', function(data) { console.log(data.toString()); });
command.variables({toto: 'Fake var we don\'t use', titi: 'Our test var set in js'});

command.exec();

3-result.txt

$ node test_node_script.js

PLAY [Node test] ***************************************************************


TASK [debug] *******************************************************************

ok: [localhost] => {
    "titi": "Our test var set in js"
}


PLAY RECAP *********************************************************************

localhost                  : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0