Tutorial: Handcrafting an Isomorphic Redux Application (With Love)
Milo Mordaunt
71862

Great article. Have a question about React.PropTypes and ImmutableJS on an isomorphic project I am working on.

For example, I have a piece of state/ the redux store called ‘chores’ that is an immutable map with I call into state through a connector. For the PropType validation, I have been using: React.PropTypes.instanceOf(Immutable.Map), which seems to be working fine.

However, when I am in the connected component and do:

const laundry = chores.get(‘laundry’)

The resulting ‘laundry’ variable is showing up as a javascript object, when I am expecting it to be an Immutable object, as fromJS deeply converts JS to Immutable — at least I thought it would?. For example, laundry.isMap() gives an error and typeof(laundry) is an object, so it appears to just be a javascript object.

However, when I pass down ‘laundry’ into a dumb-component and then use PropTypes for laundry as a PropTypes.object, I am having issues (see error below). It also did not work with instanceOf(Immutable.Map). I don’t understand why this is happening and I would like to keep using proptypes.

`Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. Check the render method of <Component>`

If you have any insights, they would be greatly appreciated. Also, I am just curious as to why you did not include PropTypes?

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