match_phrase_prefix

• Match phrase prefix is used to implement a Search as you type

curl -s "localhost:9200/movies/_search" \
  --request GET \
  --header "Content-Type: application/json" \
  --data @search.json \
| jq .

{
  "query": {
    "match_phrase_prefix": {
      "title": {
        "query": "star tr",
        "slop": 10
      }
    }
  }
}