CODEWITHSUNDEEP
javascriptreactjsimmutable.js
Even Stensberg
Even Stensberg

Reputation: 508

Extending properties in a deep nested prop ImmutableJS

I have an function that accepts populateKey as a parameter and this parameter gets passed on and used in my new state named substate. The substate now looks like this: let subState = _.get(state, "meta.populate." + populateKey);. Is there any way in Immutable to accomplish the same?

EDIT: I now used this method: see screenshot, but I get "state.updateIn" is not a function. Any reason why that is the case?

enter image description here

Upvotes: 0

Views: 79

Answers (1)

robertklep
robertklep

Reputation: 203241

There's Map#getIn():

// Example state
let state = Immutable.fromJS({ meta : { populate : { someKey : { some : 'value' } } } });

// Get the substate
let populateKey = 'someKey';
let subState    = state.getIn([ 'meta', 'populate', populateKey ]); // Map { "some" : "value" }

This obviously assumes that state is an Immutable object and that any changes to it are also propagated throughout your app as Immutable objects.

Upvotes: 1

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