[[transport]]
=== Transport

This class is responsible for performing the request to {es} and handling 
errors, it also handles sniffing.

[source,js]
----
const { Client } = require('@elastic/elasticsearch')
const { Transport } = require('@elastic/transport')

class MyTransport extends Transport {
  request (params, options, callback) {
    // your code
  }
}

const client = new Client({
    Transport: MyTransport
})
----

Sometimes you need to inject a small snippet of your code and then continue to 
use the usual client code. In such cases, call `super.method`:

[source,js]
----
class MyTransport extends Transport {
  request (params, options, callback) {
    // your code
    return super.request(params, options, callback)
  }
}
----

==== Supported content types

- `application/json`, in this case the transport will return a plain JavaScript object
- `text/plain`, in this case the transport will return a plain string
- `application/vnd.mapbox-vector-tile`, in this case the transport will return a Buffer
- `application/vnd.elasticsearch+json`, in this case the transport will return a plain JavaScript object