JavaScript (browser) client for api.ideal-postcodes.co.uk

@ideal-postcodes/core-browser is the JavaScript browser client for api.ideal-postcodes.co.uk

Our JavaScript client implements a common interface defined at @ideal-postcodes/core-interface.

High level client documentation can be found at core-interface.

In depth client documentation can be found at core-interface.ideal-postcodes.dev.

Tested against a suite of modern and legacy, mobile and desktop browsers.

@ideal-postcodes/core-browsershould be consumed by a bundler or transpiler (e.g. webpack, parcel, rollup) for minification, module resolution and specific browser support.

core-browser-bundled provides pre-bundled versions of core-browser, which can be immediately dropped into a page.

Links

• Configuration & Usage
• Quickstart
• Client Documentation
• In Depth Client Documentation
• npm Module
• GitHub Repository

Example Setup

Other JavaScript Clients

• Node.js Client Repository
• Bundled Browser Client Repository
• Axios-backed Client Repository

Documentation

Configuration & Usage

• Install
• Instantiate and Use client
• Catch Errors

Install

npm install @ideal-postcodes/core-browser

Instantiate

import { Client } from "@ideal-postcodes/core-browser";

const client = new Client({ api_key: "iddqd" });

Configuration options

Use

const addresses = await lookupPostcode({ client: client, postcode: "SW1A2AA" });

Catch Errors

import { errors } from "@ideal-postcodes/core-browser";
const { IdpcRequestFailedError } = errors;

try {
  await lookupAddress({ client, query: "10 downing street" });
} catch (error) {
  if (error instanceof IdpcRequestFailedError) {
    // IdpcRequestFailedError indicates a 402 response code
    // Possibly the key balance has been depleted
  }
}

HTTP Agent and legacy browser support

core-browser uses the Fetch API under the hood to facilitate HTTP requests.

A configuration object can be passed to the Client constructor as a second argument to override certain attributes on the Request of all subsequent fetch requests. Request configuration is documented here.

If you need to support older browsers, please include a fetch polyfill and transpile this library down to ES3. Alternatively use one of our pre-transpiled outputs at ideal-postcodes/core-browser-bundled.

Quickstart

The client exposes a number of simple methods to get at the most common tasks when interacting with the API. Below is a (incomplete) list of commonly used methods.

• Lookup a Postcode
• Search for an Address
• Search for an Address by UDPRN

For a complete list of client methods, including low level resource methods, please see the core-interface documentation

Lookup a Postcode

Return addresses associated with a given postcode

const postcode = "id11qd";

const addresses = await lookupPostcode({ client, postcode });

Method options

Search for an Address

Return addresses associated with a given query

const query = "10 downing street sw1a";

const addresses = await lookupAddress({ client, query });

Method options

Search for an Address by UDPRN

Return address for a given udprn

Invalid UDPRN will return null

const udprn = 23747771;

const address = await lookupUdprn({ client, udprn });

Method options

Test

npm test

Licence

MIT