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Stringify Object as tree structure





Build Status Test Coverage Dependabot Status Dependencies NPM Downloads Semantic-Release Gardener

Stringify Object as tree structure

    oranges: {
        'mandarin': {                                          ├─ oranges
            clementine: null,                                  │  └─ mandarin
            tangerine: 'so cheap and juicy!'        -=>        │     ├─ clementine
        }                                                      │     └─ tangerine: so cheap and juicy!
    },                                                         └─ apples
    apples: {                                                     ├─ gala
        'gala': null,                                             └─ pink lady
        'pink lady': null

Project was inspired by treeify and works almost identical. However the algorithm is much shorter and faster, works without recursion and is very memory efficient. Furthermore the output can be sorted using a custom comparator function.


$ npm install --save object-treeify


const treeify = require('object-treeify');

  oranges: {
    mandarin: {
      clementine: null,
      tangerine: 'so cheap and juicy!'
  apples: {
    gala: null,
    'pink lady': null
}, {/* options */});

// =>
// ├─ oranges
// │  └─ mandarin
// │     ├─ clementine
// │     └─ tangerine: so cheap and juicy!
// └─ apples
//    ├─ gala
//    └─ pink lady


  • Allows for custom sorting
  • Very fast and memory efficient implementation
  • Input traversed exactly once
  • Dependency free and small in size
  • Tests to verify correctness



Type: boolean Default: true

By default a single string is returned. Can be set to false to instead return an array containing lines.


Type: string Default:

Prefix for depth level when no further neighbour is present.


Type: string Default:

Prefix for depth level when a further neighbour is present.


Type: string Default: └─

Prefix for key when no further neighbour is present.


Type: string Default: ├─

Prefix for key when a further neighbour is present.


Type: function Default: null

Function that defines the key sort order. Defaults to ordering of Object.keys(...), which is typically insertion order.


More examples can be found in the tests.