Node.js File System passing values from browser

Question

I know how I can simply write a file using nodes File System. However, I have a simple HTML page with an input. I want to use javascript to get the value of the input submitted by a user and take this value and add it into the file written by node.

For example:

var fs = require('fs');

fs.writeFile('mynewfile3.txt', 'This is my text' + <VARIABLE>, function (err) {
  if (err) throw err;
  console.log('Replaced!');
});

Where is the value being pulled in from the javascript on the input.

Create a route for a POST request, add the variable to the body of the POST request and call this function when the route is hit. — Tom
– Tom, Commented Jun 3, 2019 at 18:51

Neil VanLandingham · Accepted Answer · 2019-06-03 18:59:13Z

1

Assuming you are using Express, the req object has a property called query that allows you to access the parameters sent with a request.

app.get('/myroute/', function(req, res) {
   console.log(JSON.stringify(req.query)); //log entire query object
   fs.writeFile('mynewfile3.txt', 'This is my text' + req.query.myvariable, function(err) {
        if (err) throw err;
        console.log('Replaced!');
        res.json({
                    success: true,
                    message: "File written"
                });
   });
});

answered Jun 3, 2019 at 18:59

Neil VanLandingham

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