add custom parameters into onChange callback

It will be very good to add custom parameters into onChange callback function.

Just like this:

    fireChangeEvent: function fireChangeEvent(newState) {
        if (newState.value !== this.state.value && this.props.onChange) {
            this.props.onChange(newState.value, newState.values, this.props.onChangeArguments);
        }
    },

var model = {
'a': 10
};

onItemChange: function(newState, newStates, customArgs) {
  console.log(customArgs);
}

<Select asyncOptions={this.loadOptions} placeholder={gettext('Item')} onChange={this.onItemChange} onChangeArguments={model}/>

I can commit it if it is okay for you.

[nvma]

On the second approach, onChange={(e) => this.handleSelect(item, e)} kind of does it.

[mukkachaitanya]

Or what about this approach? onChange=this.handleSelect.bind(this, e) .