@saoviettest/repudiandae-commodi-rerum-quasi

Safely flatten a nested JavaScript object.

Installation

1$ npm i @saoviettest/repudiandae-commodi-rerum-quasi

Methods

flatten(obj, [delimiter])

Flattens an object to one level deep. Optionally takes a custom delimiter, otherwise uses . by default. Circular references within the object will be replaced with [Circular].

1const { flatten } = require('@saoviettest/repudiandae-commodi-rerum-quasi')
2
3const original = {
4    a: {
5        b: {
6            c: [{
7                val: 'one'
8            }, {
9                val: 'two'
10            }],
11            d: 'three'
12        },
13        e: 'four',
14    }
15}
16original.a.b.f = original.a.b
17original.a.b.c.push(original.a)
18
19const flat = flatten(original)
20/*
21{
22  'a.b.c.0.val': 'one',
23  'a.b.c.1.val': 'two',
24  'a.b.c.2': '[Circular]',
25  'a.b.d': 'three',
26  'a.e': 'four',
27  'a.b.f': '[Circular]'
28}
29*/
30
31const underscoreFlat = flatten(original, '_')
32/*
33{
34  'a_b_c_0_val': 'one',
35  'a_b_c_1_val': 'two',
36  'a_b_c_2': '[Circular]',
37  'a_b_d': 'three',
38  'a_e': 'four',
39  'a_b_f': '[Circular]'
40}
41*/

unflatten(obj, [delimiter])

Unflattens an object back to its original nested form. Optionally takes a custom delimiter, otherwise uses . by default. Circular references denoted by [Circular] are treated as Strings.

1const { unflatten } = require('@saoviettest/repudiandae-commodi-rerum-quasi')
2
3const original = {
4    'a.b.c.0.val': 'one',
5    'a.b.c.1.val': 'two',
6    'a.b.c.2': '[Circular]',
7    'a.b.d': 'three',
8    'a.e': 'four',
9    'a.b.f': '[Circular]'
10}
11
12
13const unflat = unflatten(original)
14
15/*{
16  a:{
17    b:{
18      c:[
19        {
20          val:'one'
21        },
22        {
23          val:'two'
24        },
25        '[Circular]'
26      ],
27      d:'three',
28      f:'[Circular]'
29    },
30    e:'four'
31  }
32}*/