@elastic/app-search-javascript

A first-party JavaScript client for building excellent, relevant search experiences with Elastic App Search.

Contents

• Getting started
• Versioning
• Browser support
• Usage
• Running tests
• Development
• FAQ
• Contribute
• License

---

Getting started 🐣

Install from a CDN

The easiest way to install this client is to simply include the built distribution from the jsDelivr CDN.

<script src="https://cdn.jsdelivr.net/npm/@elastic/app-search-javascript@7.2.0/dist/elastic_app_search.umd.js"></script>

This will make the client available globally at:

window.ElasticAppSearch;

Install from NPM

This package can also be installed with npm or yarn.

npm install --save @elastic/app-search-javascript

The client could then be included into your project like follows:

// CommonJS
var ElasticAppSearch = require("@elastic/app-search-javascript");

// ES
import * as ElasticAppSearch from "@elastic/app-search-javascript";

Versioning

This client is versioned and released alongside App Search.

To guarantee compatibility, use the most recent version of this library within the major version of the corresponding App Search implementation.

For example, for App Search 7.3, use 7.3 of this library or above, but not 8.0.

If you are a SaaS user, simply use the most recent version of this library.

Browser support

The client is compatible with all modern browsers.

Note that this library depends on the Fetch API.

This is not supported by Internet Explorer. If you need backwards compatibility for Internet Explorer, you'll need to polyfill the Fetch API with something like https://github.com/github/fetch.

Usage

Setup: Configuring the client and authentication

Using this client assumes that you have already created an App Search account, and subsequently created an Engine. You'll need to configure the client with the name of your Engine and your authentication credentials, which can be found here: https://app.swiftype.com/as/credentials.

var client = ElasticAppSearch.createClient({
  hostIdentifier: "host-c5s2mj",
  searchKey: "search-mu75psc5egt9ppzuycnc2mc3",
  engineName: "favorite-videos"
});

* Please note that you should only ever use a Public Search Key within Javascript code on the browser. By default, your account should have a Key prefixed with search- that is read-only. More information can be found in the documentation.

List of configuration options:

Option	Required	Description
hostIdentifier	No	Your Host Identifier, should start with host-. Required unless explicitly setting endpointBase
searchKey	Yes	Your Public Search Key. It should start with search-.
engineName	Yes
endpointBase	No	Overrides the base of the App Search API endpoint completely. Useful when proxying the App Search API, developing against a local server, or a Managed Deploy. Ex. "http://localhost:3002"
cacheResponses	No	Whether or not API responses should be cached. Default: true.
additionalHeaders	No	An Object with keys and values that will be converted to header names and values on all API requests

Using with App Search Managed Deploys

The client can be configured to use a managed deploy by using the endpointBase parameter. Since managed deploys do not rely on a hostIdentifier , it can be omitted.

var client = ElasticAppSearch.createClient({
  searchKey: "search-mu75psc5egt9ppzuycnc2mc3",
  endpointBase: "http://127.0.0.1:3002",
  engineName: "favorite-videos"
});

API Methods

This client is a thin interface to the Elastic App Search API. Additional details for requests and responses can be found in the documentation.

Searching

For the query term lion, a search call is constructed as follows:

var options = {
  search_fields: { title: {} },
  result_fields: { id: { raw: {} }, title: { raw: {} } }
};

client
  .search("lion", options)
  .then(resultList => {
    resultList.results.forEach(result => {
      console.log(`id: ${result.getRaw("id")} raw: ${result.getRaw("title")}`);
    });
  })
  .catch(error => {
    console.log(`error: ${error}`);
  });

Note that options supports all options listed here: https://swiftype.com/documentation/app-search/guides/search.

In addition to the supported options above, we also support the following fields:

Name	Type	Description
disjunctiveFacets	Array[String]	An array of field names. Every field listed here must also be provided as a facet in the facet field. It denotes that a facet should be considered disjunctive. When returning counts for disjunctive facets, the counts will be returned as if no filter is applied on this field, even if one is applied.
disjunctiveFacetsAnalyticsTags	Array[String]	Used in conjunction with the disjunctiveFacets parameter. Queries will be tagged with "Facet-Only" in the Analytics Dashboard unless specified here.

Response

The search method returns the response wrapped in a ResultList type:

ResultList {
  rawResults: [], // List of raw `results` from JSON response
  rawInfo: { // Object wrapping the raw `meta` property from JSON response
    meta: {}
  },
  results: [ResultItem], // List of `results` wrapped in `ResultItem` type
  info: { // Currently the same as `rawInfo`
    meta: {}
  }
}

ResultItem {
  getRaw(fieldName), // Returns the HTML-unsafe raw value for a field, if it exists
  getSnippet(fieldName) // Returns the HTML-safe snippet value for a field, if it exists
}

Query Suggestion

var options = {
  size: 3,
  types: {
    documents: {
      fields: ["name"]
    }
  }
};

client
  .querySuggestion("cat", {
    size: 3,
    types: {
      documents: {
        fields: ["name"]
      }
    }
  })
  .then(response => {
    response.results.documents.forEach(document => {
      console.log(document.suggestion);
    });
  })
  .catch(error => {
    console.log(`error: ${error}`);
  });

Multi Search

It is possible to run multiple queries at once using the multiSearch method.

To search for the term lion and tiger, a search call is constructed as follows:

var options = {
  search_fields: { name: {} },
  result_fields: { id: { raw: {} }, title: { raw: {} } }
};

client
  .multiSearch([{ query: "node", options }, { query: "java", options }])
  .then(allResults => {
    allResults.forEach(resultList => {
      resultList.results.forEach(result => {
        console.log(
          `id: ${result.getRaw("id")} raw: ${result.getRaw("title")}`
        );
      });
    });
  })
  .catch(error => {
    console.log(`error: ${error}`);
  });

Clickthrough Tracking

client
  .click({
    query: "lion",
    documentId: "1234567",
    requestId: "8b55561954484f13d872728f849ffd22",
    tags: ["Animal"]
  })
  .catch(error => {
    console.log(`error: ${error}`);
  });

Clickthroughs can be tracked by binding client.click calls to click events on individual search result links.

The following example shows how this can be implemented declaratively by annotating links with class and data attributes.

document.addEventListener("click", function(e) {
  const el = e.target;
  if (!el.classList.contains("track-click")) return;

  client.click({
    query: el.getAttribute("data-query"),
    documentId: el.getAttribute("data-document-id"),
    requestId: el.getAttribute("data-request-id"),
    tags: [el.getAttribute("data-tag")]
  });
});

<a
  href="/items/1234567"
  class="track-click"
  data-request-id="8b55561954484f13d872728f849ffd22"
  data-document-id="1234567"
  data-query="lion"
  data-tag="Animal"
>
  Item 1
</a>

Running tests

The specs in this project use node-replay to capture responses.

The responses are then checked against Jest snapshots.

To capture new responses and update snapshots, run:

nvm use
REPLAY=record yarn test -u

To run tests:

nvm use
yarn test

Development

Node

You will probably want to install a node version manager, like nvm.

We depend upon the version of node defined in .nvmrc.

To install and use the correct node version with nvm:

nvm install

Dev Server

Install dependencies:

yarn

Run dev server:

yarn dev

Build

nvm use
yarn build

Publish

nvm use
yarn publish

FAQ 🔮

What if I need write operations?

App Search has a first-party Node.js client which supports write operations like indexing.

Where do I report issues with the client?

If something is not working as expected, please open an issue.

Where can I learn more about App Search?

Your best bet is to read the documentation.

Where else can I go to get help?

You can checkout the Elastic App Search community discuss forums.

Contribute 🚀

We welcome contributors to the project. Before you begin, a couple notes...

• Prior to opening a pull request, please create an issue to discuss the scope of your proposal.
• Please write simple code and concise documentation, when appropriate.

License 📗

Apache 2.0 © Elastic

Thank you to all the contributors!