YAYSON

A library for serializing and reading JSON API data in JavaScript.

From version 3 we now support native JavaScript classes. YAYSON has zero dependencies and works in the browser and in node 14 and up.

Installing

Install yayson by running:

$ npm i yayson

Presenting data

A basic Presenter can look like this:

const yayson = require('yayson')
const { Presenter } = yayson()

class BikePresenter extends Presenter {
  static type = 'bikes'
}

const bike = {
  id: 5,
  name: 'Monark'
};

BikePresenter.render(bike);

This would produce:

{
  data: {
    id: 5,
    type: 'bikes',
    attributes: {
      id: 5,
      name: 'Monark'
    }
  }
}

It also works with arrays, so if you send an array to render, "data" will be an array.

A bit more advanced example:

const yayson = require('yayson')
const { Presenter } = yayson()

class WheelPresenter extends Presenter {
  static type = 'wheels'

  relationships() {
    return { bike: BikePresenter }
  }
}

class BikePresenter extends Presenter {
  static type = 'bikes'
  relationships() {
    return { wheels: WheelPresenter }
  }
}

Sequelize support

By default it is set up to handle standard JS objects. You can also make it handle Sequelize.js models like this:

const yayson = require('yayson')
const { Presenter } = yayson({adapter: 'sequelize'})

You can also define your own adapter globally:

const yayson = require('yayson')
const { Presenter } = yayson({adapter: {
  id: function(model){ return 'omg' + model.id},
  get: function(model, key){ return model[key] }
}})

Take a look at the SequelizeAdapter if you want to extend YAYSON to your ORM. Pull requests are welcome. :)

Metadata

You can add metadata to the top level object.

  ItemsPresenter.render(items, {meta: count: 10})

This would produce:

{
  meta: {
    count: 10
  }
  data: {
    id: 5,
    type: 'items',
    attributes: {
      id: 5,
      name: 'First'
    }
  }
}

Parsing data

You can use a Store can like this:

  const {Store} = require('yayson')();
  const store = new Store();

  const data = await adapter.get({path: '/events/' + id});
  const event = store.sync(data);

This will give you the parsed event with all its relationships.

Its also possible to find in the synched data:

  const event = this.store.find('events', id)

  const images = this.store.findAll('images')

Use in the browser

Recommended way is to use it via webpack or similar build system wich lets you just require the package as usual.

If you just want to try it out, copy the file dist/yayson.js to your project. Then simply include it:

    <script src="./lib/yayson.js"></script>

Then you can var yayson = window.yayson() use the yayson.Presenter and yayson.Store as usual.

Browser support

Tested

• Chrome
• Firefox
• Safari
• Safari iOS

Untested, but should work

• IE 11
• Android

Legacy support

Earlier versions of JSON API worked a bit different from 1.0. Therefore YAYSON provides legacy presenters and stores in order to have interoperability between the versions. Its used similar to the standard presenters:

const yayson = require('yayson/legacy')
const { Presenter } = yayson()