react-json-tree/README.md

# react-json-tree

React JSON Viewer Component, Extracted from [redux-devtools](https://github.com/reduxjs/redux-devtools). Supports [iterable](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#iterable) objects, such as [Immutable.js](https://facebook.github.io/immutable-js/).

![](https://img.shields.io/npm/v/react-json-tree.svg)

### Usage

```jsx
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} />;
```

#### Result:

![](https://i.ibb.co/0KSYRJg/example-result.png)

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

### Theming

This component now uses [react-base16-styling](https://github.com/reduxjs/redux-devtools/tree/main/packages/react-base16-styling) module, which allows to customize component via `theme` property, which can be the following:

- [base16](https://github.com/chriskempson/base16) theme data. [The example theme data can be found here](https://github.com/gaearon/redux-devtools/tree/75322b15ee7ba03fddf10ac3399881e302848874/src/react/themes).
- 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](https://github.com/reduxjs/redux-devtools/blob/main/packages/react-json-tree/src/createStylingFromTheme.ts) 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.

```jsx
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',
};

<div>
  <JSONTree data={data} theme={theme} invertTheme={false} />
</div>;
```

#### Result (Monokai theme, dark background):

![](http://cl.ly/image/330o2L1J3V0h/screenshot%202015-08-26%20at%2010.48.24%20AM.png)

#### Advanced Customization

```jsx
<div>
  <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 argument `expandable`
      nestedNodeLabel: ({ style }, keyPath, nodeType, expanded) => ({
        style: {
          ...style,
          textTransform: expanded ? 'uppercase' : style.textTransform,
        },
      }),
    }}
  />
</div>
```

#### 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:

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

But if you pass the following:

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

Then the preview of child elements now look like this:

![](http://cl.ly/image/1J1a0b0T0K3c/screenshot%202015-10-07%20at%203.44.31%20PM.png)

#### Customize Rendering

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

```jsx
<JSONTree
  labelRenderer={([key]) => <strong>{key}</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](https://github.com/chibicode/react-json-tree/pull/32).

Their full signatures are:

- `labelRenderer: function(keyPath, nodeType, expanded, expandable)`
- `valueRenderer: function(valueAsString, value, ...keyPath)`

#### More Options

- `shouldExpandNodeInitially: function(keyPath, data, level)` - determines if node should be expanded when it first renders (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`.
- `postprocessValue: function(value)` - maps `value` to a new `value`
- `isCustomNode: function(value)` - overrides the default object type detection and renders the value as a single value
- `collectionLimit: number` - sets the number of nodes that will be rendered in a collection before rendering them in collapsed ranges
- `keyPath: (string | number)[]` - overrides the initial key path for the root node (defaults to `[root]`)

### Credits

- All credits to [Dave Vedder](http://www.eskimospy.com/) ([veddermatic@gmail.com](mailto:veddermatic@gmail.com)), who wrote the original code as [JSONViewer](https://bitbucket.org/davevedder/react-json-viewer/).
- Extracted from [redux-devtools](https://github.com/gaearon/redux-devtools), which contained ES6 + inline style port of [JSONViewer](https://bitbucket.org/davevedder/react-json-viewer/) by [Daniele Zannotti](http://www.github.com/dzannotti) ([dzannotti@me.com](mailto:dzannotti@me.com))
- [Iterable support](https://github.com/gaearon/redux-devtools/pull/79) thanks to [Daniel K](https://github.com/FredyC).
- npm package created by [Shu Uesugi](http://github.com/chibicode) ([shu@chibicode.com](mailto:shu@chibicode.com)) per [this issue](https://github.com/gaearon/redux-devtools/issues/85).
- Improved and maintained by [Alexander Kuznetsov](https://github.com/alexkuz). The repository was merged into [`redux-devtools` monorepo](https://github.com/reduxjs/redux-devtools) from [`alexkuz/react-json-tree`](https://github.com/alexkuz/react-json-tree).

### Similar Libraries

- [react-treeview](https://github.com/chenglou/react-treeview)
- [react-json-inspector](https://github.com/Lapple/react-json-inspector)
- [react-object-inspector](https://github.com/xyc/react-object-inspector)
- [react-json-view](https://github.com/mac-s-g/react-json-view)

### License

MIT