unist-util-inspect

unist utility to inspect trees.

What is this?
When should I use this?
Install
Use
API
Types
Compatibility
Contribute
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. In Node.js (version 14.14+ and 16.0+), install with npm:

npm install unist-util-inspect

In Deno with esm.sh:

import {inspect} from 'https://esm.sh/unist-util-inspect@7'

In browsers with esm.sh:

<script type="module">
  import {inspect} from 'https://esm.sh/unist-util-inspect@7?bundle'
</script>

Use

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:

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, inspectColor, and inspectNoColor. There is no default export.

`inspect(tree[, options])`

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

Parameters

tree (Node) — tree to inspect
options (Options, optional) — configuration

Returns

Pretty printed tree (string).

`inspectColor(tree[, options])`

Inspect a tree, with color. Otherwise same as inspect.

`inspectNoColor(tree[, options])`

Inspect a tree, without color. Otherwise same as 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.

Compatibility

Projects maintained by the unified collective are compatible with all maintained versions of Node.js. As of now, that is Node.js 14.14+ and 16.0+. Our projects sometimes work with older versions, but this is not guaranteed.

Contribute

See contributing.md in syntax-tree/.github for ways to get started. See support.md for ways to get help.

This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.