[Solved]-How to pass data from one component to another in React or React-Redux?-Reactjs

To simplify the solution you can do something like this:

<BigText onChange={data => {this.setState({ data })}} />

In the BigText component then you can put some data via this callback like this:

handleInputChange(event) {

    const data = {
        [event.target.name]: event.target.value
    };

    this.setState(data );
    this.props.onChange(data);
}

And transfer this data to your BigTextMobile component from state:

<BigTextMobile data={this.state.data} ... />