es.js

  const searchEsResult = await es.search({
    index: 'helloworld',
    body: {
      from: 0,
      size: 10,
      min_score: 1.5, // 0~2
      query: {
        function_score: {
          query: {
            bool: {
              must: [
                {
                  exists: {
                    field: `vector`
                  }
                },
                {
                  term: {
                    user_input: false
                  }
                }
              ]
            }
          },
          functions: [
            {
              script_score: {
                script: {
                  source: `cosineSimilarity(params.query_vector, doc["vector"])`,
                  params: {
                    query_vector: vector
                  }
                }
              }
            }
          ],
          boost_mode: 'replace'
        }
      }
    }
  });