vfile utility to convert between positional (line and column-based) and offsets (range-based) locations.

• What is this?
• When should I use this?
• Install
• Use
• API
  • Location
  • location(file)
• Types
• Compatibility
• Contribute
• License

This is a tiny but useful package to convert between arbitrary places in a file.

This utility is useful when ASTs nodes don’t cut it. For example, when you are making a lint rule that looks for dangerous characters in a file, which you accomplish by searching the raw file value, and still want to report it to users.

This package is ESM only. In Node.js (version 16+), install with npm:

npm install vfile-location

In Deno with esm.sh:

import {location} from 'https://esm.sh/vfile-location@5'

In browsers with esm.sh:

<script type="module">
  import {location} from 'https://esm.sh/vfile-location@5?bundle'
</script>

import {VFile} from 'vfile'
import {location} from 'vfile-location'
const place = location(new VFile('foo\nbar\nbaz'))
const offset = place.toOffset({line: 3, column: 3}) // => 10
place.toPoint(offset) // => {line: 3, column: 3, offset: 10}

Accessors for index.

• toOffset ((point?: PointLike | null | undefined) => number | undefined) — get the offset from a line/column based Point in the bound indices; returns undefined when given out of bounds input
• toPoint ((offset?: number | null | undefined) => UnistPoint | undefined) — get the line/column based Point for offset in the bound indices; returns undefined when given out of bounds input

Create an index of the given document to translate between line/column and offset based positional info.

Also implemented in Rust in wooorm/markdown-rs.

• file (VFile | Value) — file to index

Accessors for index (Location).

This package is fully typed with TypeScript. It exports the additional type Location.

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, vfile-location@^5, compatible with Node.js 16.

See contributing.md in vfile/.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.

MIT © Titus Wormer