.First, Register queries named “alert-1” and “alert-2” for the “myindex” index
[source,js]
---------
client.index({
  index: '_percolator',
  type: 'myindex',
  id: 'alert-1',
  body: {
    // This query will be run against documents sent to percolate
    query: {
      query_string: {
        query: 'foo'
      }
    }
  }
}, function (error, response) {
  // ...
});

client.index({
  index: '_percolator',
  type: 'myindex',
  id: 'alert-2',
  body: {
    // This query will also be run against documents sent to percolate
    query: {
      query_string: {
        query: 'bar'
      }
    }
  }
}, function (error, response) {
  // ...
});
---------

.Then you can send documents to learn which query `_percolator` queries they match
[source,js]
---------
client.percolate({
  index: 'myindex',
  body: {
    doc: {
      title: "Foo"
    }
  }
}, function (error, response) {
  // response would equal
  // {
  //   ok:true,
  //   matches: [ "alert-1" ]
  // }
});

client.percolate({
  index: 'myindex',
  body: {
    doc: {
      title: "Foo Bar"
    }
  }
}, function (error, response) {
  // response would equal
  // {
  //   ok:true,
  //   matches: [ "alert-1", "alert-2" ]
  // }
});
---------