react-immutable-proptypes

PropType validators that work with Immutable.js.

About

I got tired of seeing React.PropTypes.instanceOf(Immutable.List) or React.PropTypes.instanceOf(Immutable.Map) as PropTypes for components that should be specifying an Immutable.List of something or that an Immutable.Map contains some keys. A little "googling" came up empty, unless you want to use Flow, which I do not. So, I wrote react-immutable-proptypes.

Usage is simple, they work with and like any React.PropType.* validator.

var ImmutablePropTypes = require('react-immutable-proptypes');
var MyReactComponent = React.createClass({
    // ...
    propTypes: {
        myRequiredImmutableList: ImmutablePropTypes.listOf(
            ImmutablePropTypes.contains({
                someNumberProp: React.PropTypes.number.isRequired
            })
        ).isRequired
    }
    // ...
});

Since version 0.1.7 there are convenience helpers for "primitive" Immutable.js objects.

propTypes: {
    oldListTypeChecker: React.PropTypes.instanceOf(Immutable.List),
    anotherWay: ImmutablePropTypes.list,
    requiredList: ImmutablePropTypes.list.isRequired,
    mapsToo: ImmutablePropTypes.map,
    evenIterable: ImmutablePropTypes.iterable
}

Installation

Installing via npmjs

npm install --save react-immutable-proptypes

API

React-Immutable-PropTypes has:

• Primitive Types

ImmutablePropTypes.list         // Immutable.List.isList
ImmutablePropTypes.map          // Immutable.Map.isMap
ImmutablePropTypes.orderedMap   // Immutable.OrderedMap.isOrderedMap
ImmutablePropTypes.set          // Immutable.Set.isSet
ImmutablePropTypes.orderedSet   // Immutable.OrderedSet.isOrderedSet
ImmutablePropTypes.stack        // Immutable.Stack.isStack
ImmutablePropTypes.seq          // Immutable.Seq.isSeq
ImmutablePropTypes.iterable     // Immutable.Iterable.isIterable
ImmutablePropTypes.record       // instanceof Record
ImmutablePropTypes.contains     // Immutable.Iterable.isIterable - contains(shape)
ImmutablePropTypes.mapContains  // Immutable.Map.isMap - contains(shape)

• ImmutablePropTypes.listOf is based on React.PropTypes.array and is specific to Immutable.List.

• ImmutablePropTypes.mapOf is basically the same as listOf, but it is specific to Immutable.Map It will check that the prop is an Immutable.Map and that the values are of the specified type.

• ImmutablePropTypes.orderedMapOf is basically the same as listOf, but it is specific to Immutable.OrderedMap.

• ImmutablePropTypes.orderedSetOf is basically the same as listOf, but it is specific to Immutable.OrderedSet.

• ImmutablePropTypes.stackOf is basically the same as listOf, but it is specific to Immutable.Stack.

• ImmutbalePropTypes.iterableOf is the generic form of listOf/mapOf. It is useful when there is no need to validate anything other than Immutable.js compatible (ie. Immutable.Iterable). Continue to use listOf and/or mapOf when you know the type.

• ImmutablePropTypes.recordOf is like contains, except it operates on Record properties.

// ...
aRecord: ImmutablePropTypes.recordOf({
    keyA: React.PropTypes.string,
    keyB: ImmutablePropTypes.list.isRequired
})
// ...

• ImmutablePropTypes.contains (formerly shape) is based on React.PropTypes.shape and will try to work with any Immutable.Iterable. In practice, I would recommend limiting this to Immutable.Map or Immutable.OrderedMap. However, it is possible to abuse contains to validate an array via Immutable.List. That said, please, just... don't.

// ...
aMap: ImmutablePropTypes.contains({
    aList: ImmutablePropTypes.contains({
        0: React.PropTypes.number,
        1: React.PropTypes.string,
        2: React.PropTypes.number.isRequired,
    }).isRequired,
})
// ...
<SomeComponent aList={Immutable.fromJS({aList: [1, 'two', 3]})} />

• ImmutablePropTypes.mapContains is based on React.PropTypes.shape and will only work with Immutable.Map.

// ...
aMap: ImmutablePropTypes.mapContains({
    aList: ImmutablePropTypes.list.isRequired,
})
// ...
<SomeComponent aList={Immutable.fromJS({aList: [1, 2]})} />

These two validators cover the output of Immutable.fromJS on standard JSON data sources.

RFC

Please send a message or, better yet, create an issue/pull request if you know a better solution, find bugs, or want a feature. For example, should listOf work with Immutable.Seq or Immutable.Range. I can think of reasons it should, but it is not a use case I have at the present, so I'm less than inclined to implement it. Alternatively, we could add a validator for sequences and/or ranges.