holidayapi-node/README.md

# Holiday API Node.js Library

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Official Node.js library for [Holiday API](https://holidayapi.com) providing
quick and easy access to holiday information from applications written in
server-side JavaScript.

## Migrating from 2.x

In an attempt to stay current with both our development and production
dependencies, the decision was made to drop testing and advertised compatibility
with Node.js versions that are outside of their maintenance window.

For the 3.x release, testing for Node.js 13.x was added while testing for Node.js
7.x, 9.x and 11.x was dropped. Even though these older versions may still
continue to work, they become harder to test against as our dependencies improve
and drop support for those versions.

In the future, when compatibility changes, we will increment the major version
number of the release as well as document the additions and deprecations in the
release notes.

## Migrating from 1.x

Please note, version 2.x of this library is a full rewrite of the 1.x series in
TypeScript. The interfacing to the library has been simplified and existing
applications upgrading to 2.x will need to be updated.

| Version 1.x Syntax (Old)                          | Version 2.x Syntax (New)                          |
|---------------------------------------------------|---------------------------------------------------|
| `const HolidayAPI = require('node-holidayapi');`  | `import { HolidayAPI } from 'holidayapi';`        |
| `const holidayApi = new HolidayAPI(key).v1;`      | `const holidayApi = new HolidayAPI({ key });`     |
| `holidayApi.holidays(params, (err, data) => {});` | `holidayApi.holidays(params).then((data) => {});` |

Version 1.x of the library can still be found
[here](https://github.com/joshtronic/node-holidayapi).

## Documentation

Full documentation of the Holiday API endpoints is available
[here](https://holidayapi.com/docs).

## Installation

```shell
# NPM
npm install --save holidayapi

# Yarn
yarn add holidayapi
```

## Usage

```javascript
import { HolidayAPI } from 'holidayapi';

const key = 'Insert your API key here';
const holidayApi = new HolidayAPI({ key });

// Fetch supported countries and subdivisions
holidayApi.countries()
  .then((countries) => { console.log(countries); })
  .catch((err) => { console.error(err); });

// Fetch supported languages
holidayApi.languages()
  .then((languages) => { console.log(languages); })
  .catch((err) => { console.error(err); });

// Fetch holidays with minimum parameters
holidayApi.holidays({ country: 'US', year: 2019 })
  .then((holidays) => { console.log(holidays); })
  .catch((err) => { console.error(err); });

// Async? Await? No problem!
(async () => {
  // Fetch supported countries and subdivisions
  const countries = await holidayApi.countries();

  // Fetch supported languages
  const languages = await holidayApi.languages();

  // Fetch holidays with minimum parameters
  const holidays = await holidayApi.holidays({
    country: 'US',
    year: 2019,
  });
})();
```

## Examples

### Countries

#### Fetch all supported countries

```javascript
holidayApi.countries();
```

#### Search for a country by code or name

```javascript
holidayApi.countries({
  search: 'united',
});
```

### Languages

#### Fetch all supported languages

```javascript
holidayApi.languages();
```

#### Search for a language by code or name

```javascript
holidayApi.language({
  search: 'Chinese',
});
```

### Holidays

#### Fetch holidays for a specific year

```javascript
holidayApi.holidays({
  country: 'US',
  year: 2019,
});
```

#### Fetch holidays for a specific month

```javascript
holidayApi.holidays({
  country: 'US',
  year: 2019,
  month: 7,
});
```

#### Fetch holidays for a specific day

```javascript
holidayApi.holidays({
  country: 'US',
  year: 2019,
  month: 7,
  day: 4,
});
```

#### Fetch upcoming holidays based on a specific date

```javascript
holidayApi.holidays({
  country: 'US',
  year: 2019,
  month: 7,
  day: 4,
  upcoming: true,
});
```

#### Fetch previous holidays based on a specific date

```javascript
holidayApi.holidays({
  country: 'US',
  year: 2019,
  month: 7,
  day: 4,
  previous: true,
});
```

#### Fetch only public holidays

```javascript
holidayApi.holidays({
  country: 'US',
  year: 2019,
  public: true,
});
```

#### Fetch holidays for a specific subdivision

```javascript
holidayApi.holidays({
  country: 'GB-ENG',
  year: 2019,
});
```

#### Include subdivision holidays with countrywide holidays

```javascript
holidayApi.holidays({
  country: 'US',
  year: 2019,
  subdivisions: true,
});
```

#### Search for a holiday by name

```javascript
holidayApi.holidays({
  country: 'US',
  year: 2019,
  search: 'New Year',
});
```

#### Translate holidays to another language

```javascript
holidayApi.holidays({
  country: 'US',
  year: 2019,
  language: 'zh', // Chinese (Simplified)
});
```

#### Fetch holidays for multiple countries

```javascript
holidayApi.holidays({
  country: 'US,GB,NZ',
  year: 2019,
});

holidayApi.holidays({
  country: ['US', 'GB', 'NZ'],
  year: 2019,
});
```