Comment by Jason Knight on "Hi! I want to save my HTML form to a certain file in my computer. and whenever I click on submit, I want the file to get updated. and later I want to fetch the file data group wise. is this possible by using JS, AJAX, JSON only?" | Hashnode

Jason Knight

The less code you use, the less there is to break

Jul 8, 2018

The querystring module: nodejs.org/api/querystring.html

Will parse your post data into a structure FOR YOU. From there just write it to your file using "File System" with fs.writeStream.

nodejs.org/api/fs.html

Assuming you have a server-side .js for node.js that your form is submitting to... you do have that, right?

All you've shown us is client side code, and client side code cannot write to the local filesystem. (well, there is localStorage, but that's different). You want to write to a file, you generally need server-side code... aka what you should have node.js installed for.

yes sir, you are right. and this is my server side code. the html form is contact page. and I could see the form input data in form of arrays in my command prompt. where should i use/write the "fs. CREATE,APPEND and READ" commands in the below program? can you help me out.

var express = require("express");
var bodyParser = require('body-parser')
var app = express();
var urlencodedParser = bodyParser.urlencoded({ extended: false })
var router = express.Router();
var path = __dirname + '/views/';

router.use(function (req,res,next) {
  console.log("/" + req.method);
  next();
});
router.get("/contact",function(req,res){
  res.sendFile(path + "contact.html");
});
router.post("/contact",urlencodedParser,function(req,res){
  console.log(req.body)
  res.sendFile(path + "contact.html");
});
app.use("/",router);

app.use("*",function(req,res){
  res.sendFile(path + "404.html");
});

app.listen(3000,function(){
  console.log("Live at Port 3000");
});

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