my-api.js

function sendJSON( method, data, url ) {

    return fetch( url, {

        body: data && JSON.stringify( data ),
        method: "POST",
        mode: "cors",
        headers: {

            "Content-Type": "application/json"

        }

    } );

}

export function saveForLater( person ) {

    return sendJSON(
        "POST", person,
        "http://localhost:3001/for-later"
    );

}

export function fetchForLater() {

    return fetch( "http://localhost:3001/for-later" );

}