Send data to client without using an additional url

Question

Hello. What I want to know is the best way to send data to the client and this data will be received through a function (which can be executed in a click).

In the example below I will render a page (I am using express in Node.js):

app.get('/exemplo', function (req, res) {
  res.render('exemplo.html');
});

But if I want to send data to the rendered page, I will be required to use one url additional? As below:

app.get('/exemplo', function (req, res) {
  res.render('exemplo.html');
});
var data = {...}
app.get('/exemplo/data', function (req, res) {
  res.send(data);
});

Or you could do both using the same url? Or is there some other way to send data, for example user data to the page, using the expressJs.

Note: I do not use the pre-processor Jade.

From now on, thank you.

Answer 1

You can use the same route on the Express and send the data on query string, as a GET.

You can do this with ajax and then on Express .query, first argument (req) in the controller.

An example would be like this:

In Javascript, using ajax:

var data = {foo: 'bar'};
ajax(data, function(res) {
    console.log('Resposta do servidor:', res);
});

And on Node/Express, using the req.query:

app.get('/exemplo', function (req, res) {
  var txt = req.query.foo + ' bar';
  res.render({resposta: txt}); // vai mandar de volta a string para o JS
});