First and final release

As many asked for a way of using this plugin in nested arrays/objects, I figured it was worthwhile even though an official API is coming. This also fixes #1 with the help of Juan Norris ;)

Breaking changes

Before, you'd define conditional fields with the options.condition property:

{
  name: 'externalUrl',
  title: 'URL to the content',
  type: 'url',
  inputComponent: ConditionalField,
  options: {
    // DEPRECATED 👇
    condition: document => !document.internal
  }
},

Now conditionals are defined via the options.hide property, which receives a new object as its sole argument, containing the document and the fields' parents:

{
  name: 'url',
  title: 'External URL',
  type: 'string',
  inputComponent: ConditionalField,
  options: {
    hide: ({ parents }) => {
      // Parents array exposes the closest parents in order
      // Hence, parents[0] is the current object's value
      return parents[0].external
    },
  },
},

Please take a look at the docs for how to use this 😉

Just to reinforce, this plugin won't be maintained further an official Sanity APIs for conditional fields is coming.