An Isomorphic lodash snippet.

rill-lodash-email-example.js

const _ = require("lodash")

_.chain(emails)
    .chunk(100)
    .filter("to")
    .unshift(Promise.resolve())
    .reduce((p, batch)=> {
        p.then(()=> {
            fetch("http://myapi.com/email", {
                method: "POST",
                body: JSON.stringify(batch)
            });
        });
    })
    .value()
    .then(()=> {
        console.log("Emails sent!");
    });