I need to create url for get which is going to accept array, how in node.js/express extract array from request?

Question

I need to create url for get which is going to accept array, how in node.js/express extract array from request ? I need to pass array with names which parametes I need to ba

Answer 1

Using next code:

app.use('/', (req, res) => {
    console.log(req.query, typeof req.query.foo, Array.isArray(req.query.foo));
    res.send('done');
});

On backend, you have two standard approaches. For next requests:

1. /?foo=1&foo=2
2. /?foo[]=1&foo[]=2

your NodeJS backend will receive next query object:

1. { foo: [ '1', '2' ] } 'object' true
2. { foo: [ '1', '2' ] } 'object' true

So, you can choose the way you want to. My recommendation is the second one, why? If you're expect an array and you just pass a single value, then option one will interpret it as a regular value (string) and no an array.

[I said we have two standards and is not ok, there is no standard for arrays in urls, these are two common ways that exist. Each web server does it in it's own way like Apache, JBoss, Nginx, etc]