javascript - How to seperate objects with commas when writing them to a json file using nodejs? -

i sending right click coordinates client side server side , there writing them down in json file, having coordinates of different points stored different objects. how json file looks:

{"x":344,"y":158}{"x":367,"y":152}{"x":641,"y":129} 

now problem have put comma between first 2 objects in order make valid json. how can that? here request handler function:

.post(function(request, response){     console.log("request received");     var util = require('util');     var coordinates = request.body;     var imagecoordinates = json.stringify(coordinates, null, 2);     fs.appendfile('coords.json', imagecoordinates, finished);      function finished(err){         console.log('all set.');         response.send("all ok");     }      console.log('coords are:', coordinates);          });  

ok, 1 idea.

if alter appendfile add newline.. after each append, not make easier read if opened it, make easier parse.

eg.. fs.appendfile('coords.json', imagecoordinates + '\r\n', finished);

because can't run node here in browser, in code below pretend lines data read file after above mods newlines.

i generate valid json splitting , rejoining commas, , wrap inside array.

ps. filter(string) filter out last array element blank due none required last comma.

let lines = '{"x":344,"y":158}\r\n{"x":367,"y":152}\r\n{"x":641,"y":129}\r\n';    var data = json.parse('[' + (lines.split('\r\n').filter(string)).join(',') + ']');    console.log(data);