

FLATTED


A super light (0.5K) and fast circular JSON parser, directly from the
creator of CircularJSON.

Usable via CDN or as regular module.

    // 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 parameter to .parse(string, reviver) and revive your
    own objects.
-   Added a replacer 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.

* represented as string to avoid conflicts with numbers

    // 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'
