How to pass object from one file to another in javascript?

Question

I have node js server file (index.js) and client file (orderlist.js) In index.js i am getting promise object , like that

function returnOrderArray() {
    var i = 0;
    const promise = new Promise((resolve, reject) => {
        connection.query('SELECT * FROM orders', function(error, results) {
            while (i < results.length) {

                order.id[i] = results[i].id;
                order.wavetype[i] = results[i].wavetype;
                order.color[i] = results[i].color;
                order.thick[i] = results[i].thick;
                order.readydate[i] = results[i].readydate;
                order.createdate[i] = results[i].createdate;
                order.manager[i] = results[i].manager;

                i++;
            }
            resolve(order);
            // console.log(order);


        });
    });
    return promise;
}

then i want to pass it to other js file. I tried to do that with module.exports

app.get('/orderlist', checkUserSession, async function(request, response) {
    returnOrderArray().catch(error => console.log(error)).then((() => {
        module.exports.order = order;
        response.render("orderlist.ejs", { username: request.session.username });
    })).catch(error => console.log(error));
});

and then import it in orderlist.js

var ind = require('../../index')


function asd() {
    alert(ind.order);
}

but it seems not to work.

What am i doing wrong , and what's the best way to pass objects to other files in js?

oh , and file architecture

filearch

If one file is used in the server and the other file is used in the user client, how can you expect them to import each other? They can only communicate over the network, using HTTP requests or more advanced solution such as websockets — gbalduzzi
– gbalduzzi, Commented Aug 20, 2020 at 13:06
See something like this: stackoverflow.com/questions/35213706/… — gbalduzzi
– gbalduzzi, Commented Aug 20, 2020 at 13:08

Ranjeet Eppakayala · Accepted Answer · 2020-08-20 13:33:24Z

1

You need to export your module like so: module.exports = returnOrderArray

try this,

orderlist.js

const returnOrderArray = () => {...some code..}
module.exports = returnOrderArray

index.js

const returnOrderArray = require('./path/to/orderlist.js')

const run = async() => {
const orderlist = await returnOrderArray() // use await or then as you prefer
}
run()

async_await link if curious!

Hope this will work :)

edited Aug 20, 2020 at 13:33

answered Aug 20, 2020 at 13:26

Ranjeet Eppakayala

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