# flatted
|
|
 [](https://coveralls.io/github/WebReflection/flatted?branch=master) [](https://travis-ci.org/WebReflection/flatted) [](https://opensource.org/licenses/ISC) 
|
|
A super light (0.5K) and fast circular JSON parser, directly from the creator of [CircularJSON](https://github.com/WebReflection/circular-json/#circularjson).
|
|
Usable via [CDN](https://unpkg.com/flatted) or as regular module.
|
|
```js
|
// ESM
|
import {parse, stringify} from 'flatted/esm';
|
|
// CJS
|
const {parse, stringify} = require('flatted/cjs');
|
|
const a = [{}];
|
a[0].a = a;
|
a.push(a);
|
|
stringify(a); // [["1","0"],{"a":"0"}]
|
```
|
|
### New in V1: Exact same JSON API
|
|
* Added a [reviver](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse#Syntax) parameter to `.parse(string, reviver)` and revive your own objects.
|
* Added a [replacer](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#Syntax) and a `space` parameter to `.stringify(object, replacer, space)` for feature parity with JSON signature.
|
|
|
### Compatibility
|
All ECMAScript engines compatible with `Map`, `Set`, `Object.keys`, and `Array.prototype.reduce` will work, even if polyfilled.
|
|
|
### How does it work ?
|
While stringifying, all Objects, including Arrays, and strings, are flattened out and replaced as unique index. `*`
|
|
Once parsed, all indexes will be replaced through the flattened collection.
|
|
<sup><sub>`*` represented as string to avoid conflicts with numbers</sub></sup>
|
|
```js
|
// logic example
|
var a = [{one: 1}, {two: '2'}];
|
a[0].a = a;
|
// a is the main object, will be at index '0'
|
// {one: 1} is the second object, index '1'
|
// {two: '2'} the third, in '2', and it has a string
|
// which will be found at index '3'
|
|
Flatted.stringify(a);
|
// [["1","2"],{"one":1,"a":"0"},{"two":"3"},"2"]
|
// a[one,two] {one: 1, a} {two: '2'} '2'
|
```
|
