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Node.js - jsonfile ================ Easily read/write JSON files. [](https://www.npmjs.org/package/jsonfile) [](http://travis-ci.org/jprichardson/node-jsonfile) [](https://ci.appveyor.com/project/jprichardson/node-jsonfile/branch/master) <a href="https://github.com/feross/standard"><img src="https://cdn.rawgit.com/feross/standard/master/sticker.svg" alt="Standard JavaScript" width="100"></a> Why? ---- Writing `JSON.stringify()` and then `fs.writeFile()` and `JSON.parse()` with `fs.readFile()` enclosed in `try/catch` blocks became annoying. Installation ------------ npm install --save jsonfile API --- ### readFile(filename, [options], callback) `options` (`object`, default `undefined`): Pass in any `fs.readFile` options or set `reviver` for a [JSON reviver](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse). - `throws` (`boolean`, default: `true`). If `JSON.parse` throws an error, pass this error to the callback. If `false`, returns `null` for the object. ```js var jsonfile = require('jsonfile') var file = '/tmp/data.json' jsonfile.readFile(file, function(err, obj) { console.dir(obj) }) ``` ### readFileSync(filename, [options]) `options` (`object`, default `undefined`): Pass in any `fs.readFileSync` options or set `reviver` for a [JSON reviver](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse). - `throws` (`boolean`, default: `true`). If an error is encountered reading or parsing the file, throw the error. If `false`, returns `null` for the object. ```js var jsonfile = require('jsonfile') var file = '/tmp/data.json' console.dir(jsonfile.readFileSync(file)) ``` ### writeFile(filename, obj, [options], callback) `options`: Pass in any `fs.writeFile` options or set `replacer` for a [JSON replacer](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify). Can also pass in `spaces` and override `EOL` string. ```js var jsonfile = require('jsonfile') var file = '/tmp/data.json' var obj = {name: 'JP'} jsonfile.writeFile(file, obj, function (err) { console.error(err) }) ``` **formatting with spaces:** ```js var jsonfile = require('jsonfile') var file = '/tmp/data.json' var obj = {name: 'JP'} jsonfile.writeFile(file, obj, {spaces: 2}, function(err) { console.error(err) }) ``` **overriding EOL:** ```js var jsonfile = require('jsonfile') var file = '/tmp/data.json' var obj = {name: 'JP'} jsonfile.writeFile(file, obj, {spaces: 2, EOL: '\r\n'}, function(err) { console.error(err) }) ``` **appending to an existing JSON file:** You can use `fs.writeFile` option `{flag: 'a'}` to achieve this. ```js var jsonfile = require('jsonfile') var file = '/tmp/mayAlreadyExistedData.json' var obj = {name: 'JP'} jsonfile.writeFile(file, obj, {flag: 'a'}, function (err) { console.error(err) }) ``` ### writeFileSync(filename, obj, [options]) `options`: Pass in any `fs.writeFileSync` options or set `replacer` for a [JSON replacer](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify). Can also pass in `spaces` and override `EOL` string. ```js var jsonfile = require('jsonfile') var file = '/tmp/data.json' var obj = {name: 'JP'} jsonfile.writeFileSync(file, obj) ``` **formatting with spaces:** ```js var jsonfile = require('jsonfile') var file = '/tmp/data.json' var obj = {name: 'JP'} jsonfile.writeFileSync(file, obj, {spaces: 2}) ``` **overriding EOL:** ```js var jsonfile = require('jsonfile') var file = '/tmp/data.json' var obj = {name: 'JP'} jsonfile.writeFileSync(file, obj, {spaces: 2, EOL: '\r\n'}) ``` **appending to an existing JSON file:** You can use `fs.writeFileSync` option `{flag: 'a'}` to achieve this. ```js var jsonfile = require('jsonfile') var file = '/tmp/mayAlreadyExistedData.json' var obj = {name: 'JP'} jsonfile.writeFileSync(file, obj, {flag: 'a'}) ``` License ------- (MIT License) Copyright 2012-2016, JP Richardson <jprichardson@gmail.com>