Send a variable or array from javaScript to node js with ajax

Question

I wanna do this: Grab some data from my dom with javascript, save them to a variable and then send that to node js, grab that with express and finally save that into database. client side javaScript:

var tags = ["apple","orange","green"];

$.ajax({
        type: "POST",
        url: '/posts',
        data: { tags : tags },
        success: function(data)
        {
            alert("success!");
        }
    });

now I am trying to grab that data with express like this:

My server code:

/***** CREATE A POST *****/
app.post('/posts', function (req, res) {

  //code

  var tags = req.body.tags;

  // create that post

});

But that doesn't work correct. what is the problem?

can you see if you are correctly going to the /posts POST call, and try doing console.log(req.body.tags), and see if you are successfully receiving the data — Ravi Shankar Bharti
– Ravi Shankar Bharti, Commented Jan 7, 2017 at 14:29
Yes I use bodyParser. Do I need to install any esp package in order to use ajax? — Joseph
– Joseph, Commented Jan 7, 2017 at 17:04

deniscapp · Accepted Answer · 2017-01-07 19:51:44Z

1

The only thing you need to do, is to use body-parser before your "post" route, otherwise it won't work. The order of the middleware matters.

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

app.post('/posts', function (req, res) {

  //code

  var tags = req.body.tags;

  // create that post

});

answered Jan 7, 2017 at 19:51

deniscapp

8201 gold badge11 silver badges24 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Robson Pontes · Accepted Answer · 2017-01-08 03:06:36Z

0

You must input host and port information in the request, like this:

$.ajax({ type: "POST", url: 'http://localhost:3000/posts', data: { tags : tags }, success: function(data) { alert("success!"); } });

answered Jan 8, 2017 at 3:06

Robson Pontes

92 bronze badges

Collectives™ on Stack Overflow

Send a variable or array from javaScript to node js with ajax

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related