Writing JSON object to a JSON file with fs.writeFileSync
Make the json human readable by passing a third argument to stringify
:
fs.writeFileSync('../data/phraseFreqs.json', JSON.stringify(output, null, 4));
I don't think you should use the synchronous approach, asynchronously writing data to a file is better also stringify the output
if it's an object
.
Note: If output
is a string, then specify the encoding and remember the flag
options as well.:
const fs = require('fs');
const content = JSON.stringify(output);
fs.writeFile('/tmp/phraseFreqs.json', content, 'utf8', function (err) {
if (err) {
return console.log(err);
}
console.log("The file was saved!");
});
Added Synchronous method of writing data to a file, but please consider your use case. Asynchronous vs synchronous execution, what does it really mean?
const fs = require('fs');
const content = JSON.stringify(output);
fs.writeFileSync('/tmp/phraseFreqs.json', content);
When sending data to a web server, the data has to be a string (here). You can convert a JavaScript object into a string with JSON.stringify()
.
Here is a working example:
var fs = require('fs');
var originalNote = {
title: 'Meeting',
description: 'Meeting John Doe at 10:30 am'
};
var originalNoteString = JSON.stringify(originalNote);
fs.writeFileSync('notes.json', originalNoteString);
var noteString = fs.readFileSync('notes.json');
var note = JSON.parse(noteString);
console.log(`TITLE: ${note.title} DESCRIPTION: ${note.description}`);
Hope it could help.
You need to stringify the object.
fs.writeFileSync('../data/phraseFreqs.json', JSON.stringify(output));