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Programming language: JavaScript
License: MIT License
Tags: UI Components     Miscellaneous     React     Json Viewer    
Latest version: v0.10.7

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This package was merged into redux-devtools monorepo. Please refer to that repository for the latest updates, issues and pull requests.


React JSON Viewer Component, Extracted from redux-devtools. Supports iterable objects, such as Immutable.js.


import JSONTree from 'react-json-tree'
// If you're using Immutable.js: `npm i --save immutable`
import { Map } from 'immutable'

// Inside a React component:
const json = {
  array: [1, 2, 3],
  bool: true,
  object: {
    foo: 'bar'
  immutable: Map({ key: 'value' })

<JSONTree data={json} />

Check out [examples](examples) directory for more details.


This component now uses react-base16-styling module, which allows to customize component via theme property, which can be the following:

  • base16 theme data. The example theme data can be found here.
  • object that contains style objects, strings (that treated as classnames) or functions. A function is used to extend its first argument { style, className } and should return an object with the same structure. Other arguments depend on particular context (and should be described here). See createStylingFromTheme.js for the list of styling object keys. Also, this object can extend base16 theme via extend property.

Every theme has a light version, which is enabled with invertTheme prop.

const theme = {
  scheme: 'monokai',
  author: 'wimer hazenberg (http://www.monokai.nl)',
  base00: '#272822',
  base01: '#383830',
  base02: '#49483e',
  base03: '#75715e',
  base04: '#a59f85',
  base05: '#f8f8f2',
  base06: '#f5f4f1',
  base07: '#f9f8f5',
  base08: '#f92672',
  base09: '#fd971f',
  base0A: '#f4bf75',
  base0B: '#a6e22e',
  base0C: '#a1efe4',
  base0D: '#66d9ef',
  base0E: '#ae81ff',
  base0F: '#cc6633'

  <JSONTree data={data} theme={theme} invertTheme={false} />

Result (Monokai theme, dark background):

Advanced Customization
  <JSONTree data={data} theme={{
    extend: theme,
    // underline keys for literal values
    valueLabel: {
      textDecoration: 'underline'
    // switch key for objects to uppercase when object is expanded.
    // `nestedNodeLabel` receives additional arguments `expanded` and `keyPath`
    nestedNodeLabel: ({ style }, nodeType, expanded) => ({
      style: {
        textTransform: expanded ? 'uppercase' : style.textTransform
  }} />
Customize Labels for Arrays, Objects, and Iterables

You can pass getItemString to customize the way arrays, objects, and iterable nodes are displayed (optional).

By default, it'll be:

<JSONTree getItemString={(type, data, itemType, itemString)
  => <span>{itemType} {itemString}</span>}

But if you pass the following:

const getItemString = (type, data, itemType, itemString)
  => (<span> // {type}</span>);

Then the preview of child elements now look like this:

Customize Rendering

You can pass the following properties to customize rendered labels and values:

    labelRenderer={raw => <strong>{raw}</strong>}
    valueRenderer={raw => <em>{raw}</em>}

In this example the label and value will be rendered with <strong> and <em> wrappers respectively.

For labelRenderer, you can provide a full path - see this PR.

More Options
  • shouldExpandNode: function(keyName, data, level) - determines if node should be expanded (root is expanded by default)
  • hideRoot: Boolean - if true, the root node is hidden.
  • sortObjectKeys: Boolean | function(a, b) - sorts object keys with compare function (optional). Isn't applied to iterable maps like Immutable.Map.


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*Note that all licence references and agreements mentioned in the react-json-tree README section above are relevant to that project's source code only.