Object.freeze

[hnordt]

State/props passed to children() shouldn't be mutated.

  render() {
    return this.props.children({ data: this.state.data, error: this.state.error })
  }

In this example data and error shouldn't mutated by the consumer.

To prevent mutation, I think that we can do something like this:

  render() {
    const frozenState = deepFreeze({ ...this.state })
    return this.props.children(frozenState)
  }

[hnordt]

I won't implement it for now.

[gaearon]

Freezing is also somewhat slow, I'd only recommend it in development.

[hnordt]

Thank you @gaearon