client/src/Components/WeatherForm.jsx

WeatherForm.jsx

// imports

class WeatherForm extends Component {
    // default state values
    // componentDidMount()
    // refreshSaveWeather()
    // onChange()
    // saveFormData()
    // saveToLocalStorage()
    
    saveToMongo = (event) => {
        axios.post("/api/weatherMongo", {
            zipCode: this.state.zipCodeInput,
            tempMetric: this.state.tempMetric
        }).then(response => {
            let weatherData = response.data;

            // do whatever you want with the weather data
        });
    }

    render() {
        return (
            <Form className="weather-form" onSubmit={this.saveToMongo}>
                ...
            </Form>
        );
    }
}

export default WeatherForm;