How to export method and variables in react?

How to use globally any method or variable in react?

Need to create a helper.js file or as you wish according to your requirement. Then create method or variable but remember that use “export” keyword before function or variable as below code:

Helper.js 

export var myCompanyName = 'https://www.anythinglearn.com/'

export var baseUrl = 'http://localhost:3009/'

export function days(day) {

    if (day === '1') {

        return 'Monday';

    } else if (day === '2') {

        return 'Tuesday';

    } else if (day === '3') {

        return 'Wednesday';

    } else if (day === '4') {

        return 'Thursday';

    } else if (day === '5') {

        return 'Friday';

    } else if (day === '6') {

        return 'Saturday';

    } else if (day === '7') {

        return 'Sunday';

    } else {

        return 'Good Day';

    }

}

var theMonths = ["January", "February", "March", "April", "May",

    "June", "July", "August", "September", "October", "November", "December"];

export function dateFormates(date) {

    var today = new Date(date);

    var dd = today.getDate();

    var mm = today.getMonth(); //January is 0!

    var yyyy = today.getFullYear();

    mm = theMonths[mm];

    return mm + ' ' + dd + ' ' + yyyy;

}

 import {myCompanyName} from '../assets/js/helpers'

{dateFormates(this.props.createDate)}

axios.put(baseUrl+'api/'+id, detailObject)