0.21.0

Breaking

• Minim no longer supports importing files directly from the minim package.
  Importing the JSON 0.6 serialiser via
  require('minim/lib/serialisers/json-0.6') is not supported, it is now
  recommended to import JSON06Serialiser and other APIs from minim directly.

  const { JSON06Serialiser } = require('minim');

• flatMap in ArraySlice no longer removes empty items. Instead flatMap is
  aligned with
  Array.flatMap
  which first maps each element using a mapping function, then flattens the
  result into a new array.

  Existing flatMap behaviour is now available under the method compactMap.

Enhancements

• Object Element can now be created with an array of member elements.

• You can now create an element from an ArraySlice or ObjectSlice, for example,
  passing the result of a filter operation into a new element.

  const numbers = new ArrayElement([1, 2, 3, 4])
  new ArrayElement(numbers.filter((e) => e.toValue() % 2))
  

• Adds compactMap functionality to Array and Object elements allowing you to
  returns an array containing the truthy results of calling the given
  transformation with each element of this sequence.

• Added flatMap to ArrayElement.

Bug Fixes

• The default content value of an element is undefined. Whereas before the
  default value was null.

• Setting the content property on an Element now behaves the same as passing
  content in to the constructor. For example, the following two elements are
  identical:

  new ArrayElement([1])
  
  const element = new ArrayElement()
  element.content = [1]

  Passing [1] to an ArrayElement constructor would produce an array of
  number elements, whereas setting the content to [1] resulted in setting the
  content to be an array of non-elements which is invalid.

• The serialisation of the variable attribute in the JSON 0.6 serialisation
  is updated to reflect API Elements 1.0. The variable attribute is now
  present on a member element instead of the key of a member element.

• Empty arrays are no longer serialised in JSON 06 Serialiser.