unified

Project: syntax-tree/unist-util-position-from-estree

Package: unist-util-position-from-estree@1.1.1

  1. Dependents: 0
  2. unist utility to get a position from an estree node
  1. util 136
  2. utility 132
  3. unist 128
  4. unist-util 25
  5. node 23
  6. javascript 21
  7. position 9
  8. ecmascript 7
  9. estree 4
  10. recma 3
  11. esast 3

unist-util-position-from-estree

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unist utility to get a position from an estree node.

Contents

What is this?

This package is a tiny utility that can create a proper unist position from an estree node

When should I use this?

You can use this package when you want to use other unist utilities with estree nodes.

Install

This package is ESM only. In Node.js (version 12.20+, 14.14+, 16.0+, or 18.0+), install with npm:

npm install unist-util-position-from-estree

In Deno with esm.sh:

import {positionFromEstree} from 'https://esm.sh/unist-util-position-from-estree@1'

In browsers with esm.sh:

<script type="module">
  import {positionFromEstree} from 'https://esm.sh/unist-util-position-from-estree@1?bundle'
</script>

Use

import {parse} from 'acorn'
import {positionFromEstree} from 'unist-util-position-from-estree'

// Make acorn support line/column.
const node = parse('function x() { console.log(1) }', {
  ecmaVersion: 2020,
  locations: true
})

console.log(positionFromEstree(node)) // `Program`
console.log(positionFromEstree(node.body[0].id)) // `x`
console.log(positionFromEstree(node.body[0].body.body[0].expression)) // Call

Yields:

{
  start: {line: 1, column: 1, offset: 0},
  end: {line: 1, column: 32, offset: 31}
}
{
  start: {line: 1, column: 10, offset: 9},
  end: {line: 1, column: 11, offset: 10}
}
{
  start: {line: 1, column: 16, offset: 15},
  end: {line: 1, column: 30, offset: 29}
}

API

This package exports the identifier positionFromEstree. There is no default export.

positionFromEstree(node)

Given a node, returns a position.

Types

This package is fully typed with TypeScript. It exports no additional types.

Compatibility

Projects maintained by the unified collective are compatible with all maintained versions of Node.js. As of now, that is Node.js 12.20+, 14.14+, 16.0+, and 18.0+. 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.

License

MIT © Titus Wormer