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https://github.com/syntax-tree/unist-util-inspect

utility to inspect nodes
https://github.com/syntax-tree/unist-util-inspect

console inspect syntax-tree unist unist-util util

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utility to inspect nodes

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# unist-util-inspect



[![Build][build-badge]][build]

[![Coverage][coverage-badge]][coverage]

[![Downloads][downloads-badge]][downloads]

[![Size][size-badge]][size]

[![Sponsors][sponsors-badge]][collective]

[![Backers][backers-badge]][collective]

[![Chat][chat-badge]][chat]



[unist][] utility to inspect trees.



## Contents



*   [What is this?](#what-is-this)

*   [When should I use this?](#when-should-i-use-this)

*   [Install](#install)

*   [Use](#use)

*   [API](#api)

    *   [`inspect(tree[, options])`](#inspecttree-options)

    *   [`inspectColor(tree[, options])`](#inspectcolortree-options)

    *   [`inspectNoColor(tree[, options])`](#inspectnocolortree-options)

    *   [`Options`](#options)

*   [Types](#types)

*   [Compatibility](#compatibility)

*   [Contribute](#contribute)

*   [License](#license)



## What is this?



This is a utility pretty prints the tree.



## When should I use this?



This utility pretty prints the tree in a format that is made custom for unist

trees, which is terser than the often verbose and repetitive JSON,

to more easily spot bugs and see what’s going on in the tree.



## Install



This package is [ESM only][esm].

In Node.js (version 16+), install with [npm][]:



```sh

npm install unist-util-inspect

```



In Deno with [`esm.sh`][esmsh]:



```js

import {inspect} from 'https://esm.sh/unist-util-inspect@8'

```



In browsers with [`esm.sh`][esmsh]:



```html



  import {inspect} from 'https://esm.sh/unist-util-inspect@8?bundle'



```



## Use



```js

import {u} from 'unist-builder'

import {inspect} from 'unist-util-inspect'



const tree = u('root', [

  u('literal', '1'),

  u('parent', [

    u('void', {id: 'a'}),

    u('literal', '2'),

    u('node', {id: 'b'}, [])

  ])

])



console.log(inspect(tree))

```



Yields:



```text

root[2]

├─0 literal "1"

└─1 parent[3]

    ├─0 void

    │     id: "a"

    ├─1 literal "2"

    └─2 node[0]

          id: "b"

```



## API



This package exports the identifiers [`inspect`][api-inspect],

[`inspectColor`][api-inspectcolor], and [`inspectNoColor`][api-inspectnocolor].

There is no default export.



### `inspect(tree[, options])`



Inspect a tree, with color in Node, without color in browsers.



###### Parameters



*   `tree` ([`Node`][node])

    — tree to inspect

*   `options` ([`Options`][api-options], optional)

    — configuration



###### Returns



Pretty printed `tree` (`string`).



### `inspectColor(tree[, options])`



Inspect a tree, with color.

Otherwise same as [`inspect`][api-inspect].



### `inspectNoColor(tree[, options])`



Inspect a tree, without color.

Otherwise same as [`inspect`][api-inspect].



### `Options`



Configuration (TypeScript type).



###### Fields



*   `showPositions` (`boolean`, default: `true`)

    — whether to include positional information



## Types



This package is fully typed with [TypeScript][].

It exports the additional type [`Options`][api-options].



## Compatibility



Projects maintained by the unified collective are compatible with maintained

versions of Node.js.



When we cut a new major release, we drop support for unmaintained versions of

Node.

This means we try to keep the current release line, `unist-util-inspect@^8`,

compatible with Node.js 16.



## Contribute



See [`contributing.md`][contributing] in [`syntax-tree/.github`][health] for

ways to get started.

See [`support.md`][support] for ways to get help.



This project has a [code of conduct][coc].

By interacting with this repository, organization, or community you agree to

abide by its terms.



## License



[MIT][license] © [Titus Wormer][author]



[build-badge]: https://github.com/syntax-tree/unist-util-inspect/workflows/main/badge.svg



[build]: https://github.com/syntax-tree/unist-util-inspect/actions



[coverage-badge]: https://img.shields.io/codecov/c/github/syntax-tree/unist-util-inspect.svg



[coverage]: https://codecov.io/github/syntax-tree/unist-util-inspect



[downloads-badge]: https://img.shields.io/npm/dm/unist-util-inspect.svg



[downloads]: https://www.npmjs.com/package/unist-util-inspect



[size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=unist-util-inspect



[size]: https://bundlejs.com/?q=unist-util-inspect



[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg



[backers-badge]: https://opencollective.com/unified/backers/badge.svg



[collective]: https://opencollective.com/unified



[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg



[chat]: https://github.com/syntax-tree/unist/discussions



[npm]: https://docs.npmjs.com/cli/install



[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c



[esmsh]: https://esm.sh



[typescript]: https://www.typescriptlang.org



[license]: license



[author]: https://wooorm.com



[health]: https://github.com/syntax-tree/.github



[contributing]: https://github.com/syntax-tree/.github/blob/main/contributing.md



[support]: https://github.com/syntax-tree/.github/blob/main/support.md



[coc]: https://github.com/syntax-tree/.github/blob/main/code-of-conduct.md



[unist]: https://github.com/syntax-tree/unist



[node]: https://github.com/syntax-tree/unist#node



[api-inspect]: #inspecttree-options



[api-inspectcolor]: #inspectcolortree-options



[api-inspectnocolor]: #inspectnocolortree-options



[api-options]: #options