如何将变量数据从 javascript 发送到节点 js？

Question

I want to send the variable from javascript to node js

here I am storing some data in my javascript variable

var roomurl = "this is the data";

And here is my nodejs code

app.post("/newcall", function(req, res) {
  var n = (req.body.roomurl);
  console.log("val"+ n);
});

I have included all the dependencies like express and body parser

but I am not how to send it

can I get help in my javascript code or

any Url from where I can get to now about how do

I send data from java script to node js? thanks

Answer 1

Actually, you should run the node/express application to a specific port, ex 3000

app.listen(3000, () => {
  console.log('App running at 3000')
})

Then from your client you should post your data via Fetch API or another http client like this

fetch('http://localhost:3000/newcall', {
    method: 'POST', 
    headers: {
     'Content-Type': 'application/json',
    },
    body: JSON.stringify({roomurl})
});