ReactJS update state dynamically

Question

I'm trying to update a components state dynamically based on the arguments sent on a callback function.

So, the goal is if the component sends valueChange('id', 1) ... this.state.contractLine.id will be updated to 1 and if the component sends valueChange('innerLevel.name', 'newName') this.state.contractLine.innerLevel.name will be updated to newName

This is the code i'm using (but it's not working like expected).

valueChange(statePath, inputValue) {
    var newState = this.state; 

    var stateBeingChanged = this.state['contractLine'];

    var pathList = statePath.split('.');
        for (var i = 0; i < pathList.length; i++) {
            var elem = pathList[i];
            stateBeingChanged = stateBeingChanged[elem];
        }

    stateBeingChanged = inputValue;

    newState['contractLine'] = stateBeingChanged;

    this.setState(newState);
}

Any ideas?

EDIT --SOLVED--

Just in case someone has the same problem... I followed @rauliyohmc advice and managed to solve the problem with lodash . The code used (much simpler than I ever thought) was:

valueChange(statePath, inputValue) {
    var newState = Object.assign({}, this.state['contractLine']);

    _.set(newState, statePath, inputValue);

    this.setState({contractLine: newState});
}

Answer 1

Just in case someone has the same problem... I followed @rauliyohmc advice and managed to solve the problem with lodash. The code used (much simpler than I ever thought) was:

valueChange(statePath, inputValue) {
    var newState = Object.assign({}, this.state['contractLine']);

    _.set(newState, statePath, inputValue);

    this.setState({contractLine: newState});
}