Write a JSON file to disk, also creates intermediate directories in the destination path if they don't already exist.
Please consider following this project's author, Jon Schlinkert, and consider starring the project to show your ❤️ and support.
Install with npm:
$ npm install --save write-jsonvar writeJson = require('write-json');
// async
writeJson('foo.json', {abc: 'xyz'}, function(err) {
// do stuff with err
});
// sync
writeJson.sync('foo.json', {abc: 'xyz'});JSON.stringify
All methods support the same arguments as JSON.stringify (note that if you want to pass a replacer function to writeJson - the main export, you must pass the replacer on an options object)
// async
writeJson('foo.json', {abc: 'xyz'}, null, 2, function(err) {
if (err) console.log(err);
});
// sync
writeJson.sync('foo.json', {abc: 'xyz'}, null, 2);Or as an options object:
var options = {
replacer: function(key, value) {
// filter out properties
if (typeof value === 'string') {
return undefined;
}
return value;
},
indent: 2
};
// async
writeJson('foo.json', {abc: 'xyz'}, options, function(err) {
if (err) console.log(err);
});
// sync
writeJson.sync('actual/test.json', expected, options);Calls JSON.stringify on the given value then asynchronously writes the result to a file, replacing the file if it already exists and creating any intermediate directories if they don't already exist. Returns a promise if a callback function is not passed.
Params
filepath{string}: Destination file pathvalue{object}: Value to stringify.options{object}: Options to pass to JSON.stringifycallback{Function}: (optional) If no callback is provided, a promise is returned.returns{undefined}
Example
var writeJson = require('write');
var pkg = {name: 'write-json'};
writeJson('foo.json', pkg, function(err) {
if (err) console.log(err);
});
// pass options to JSON.stringify explicitly
writeJson('foo.json', pkg, null, 2, function(err) {
if (err) console.log(err);
});
// pass options to JSON.stringify as an object
// (since this method returns a promise if no callback is passed,
// if you want to pass a replacer function to JSON.stringify, it
// must be passed on an options object)
writeJson('foo.json', pkg, {
indent: 2,
replacer: function(value) {
// filter out properties
if (typeof value === 'string') {
return undefined;
}
return value;
}
}, function(err) {
if (err) console.log(err);
});The promise version of writeFile. Returns a promise.
Params
filepath{String}: Destination file pathvalue{any}: The value to stringifyoptions{object}: Options to pass to JSON.stringifyreturns{Promise}
Example
var writeJson = require('write');
writeJson.promise('package.json', {name: 'write-json'})
.then(function() {
// do stuff
});The synchronous version of writeFile. Returns undefined.
Params
filepath{String}: Destination file pathvalue{any}: The value to stringifyoptions{object}: Options to pass to JSON.stringifyreturns{undefined}
Example
var writeJson = require('write');
writeJson.sync('package.json', {name: 'write-json'});The stream version of writeFile. Returns a new WriteStream object.
Params
filepath{string|Buffer|integer}: filepath or file descriptor.options{object}: Options to pass to mkdirp and [fs.createWriteStream][fs]{#fs_fs_createwritestream_path_options}returns{Stream}: Returns a new WriteStream object. (See Writable Stream).
Example
var fs = require('fs');
var writeJson = require('write');
fs.createReadStream('defaults.json')
.pipe(writeJson.stream('package.json'))
.on('close', function() {
// do stuff
});Changed
- The main function now returns a promise if no callback is passed
Added
- adds promise support
- adds stream support
Fixed
- Make sure
JSON.stringifyreceives all intended arguments
Contributing
Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
Running Tests
Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:
$ npm install && npm testBuilding docs
(This project's readme.md is generated by verb, please don't edit the readme directly. Any changes to the readme must be made in the .verb.md readme template.)
To generate the readme, run the following command:
$ npm install -g verbose/verb#dev verb-generate-readme && verbYou might also be interested in these projects:
- delete: Delete files and folders and any intermediate directories if they exist (sync and async). | homepage
- read-data: Read JSON or YAML files. | homepage
- read-yaml: Very thin wrapper around js-yaml for directly reading in YAML files. | homepage
- write-data: Write a YAML or JSON file to disk. Automatically detects the format to write based… more | homepage
- write-yaml: Write YAML. Converts JSON to YAML writes it to the specified file. | homepage
- write: Write data to a file, replacing the file if it already exists and creating any… more | homepage
Jon Schlinkert
Copyright © 2018, Jon Schlinkert. Released under the MIT License.
This file was generated by verb-generate-readme, v0.6.0, on January 26, 2018.