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3.13.1

npm

js-yaml

YAML 1.2 parser and serializer

parserpyyamlserializeryaml
Published5 Apr 2019
Direct dependencies11
Transitive dependenciesNot calculated

README

Current package documentation

js-yaml

CI NPM version

YAML 1.2 parser and serializer for JavaScript.

Online demo

  • Supports the YAML 1.2 and YAML 1.1 specifications.
  • Passes the entire YAML Test Suite.

Documentation >>

Install
npm install js-yaml
Usage
import { load } from 'js-yaml'

try {
  const document = load('greeting: hello')
  console.log(document.greeting)
} catch (e) {
  console.error(e)
}

import { dump } from 'js-yaml'

const source = dump({ greeting: 'hello' })
console.log(source)

More usage examples.

Downloads & popularity

2,312,094downloads
7-day window · source-reported counts20 Oct 2026
2.3M1.2M0
2026-10-20: 2,312,094 · observed 2026-10-20T08:44:05.3841913Z
20 Oct20 Oct

npm · 1 observations shown. Missing days are unknown.

View observed values
Date / source periodValueObserved at
2026-10-202,312,0942026-10-20T08:44:05.3841913Z

Declared dependencies 11

Native requirements
11 direct targetsNot calculated transitive count
Package / targetRequirementRelationship
esprima
Environment
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}
^4.0.0runtime
argparse
Environment
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  "alias": false,
  "peer_metadata": null
}
^1.0.7runtime
ansi
Environment
{
  "local_name": "ansi",
  "alias": false,
  "peer_metadata": null
}
^0.3.1development
mocha
Environment
{
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  "alias": false,
  "peer_metadata": null
}
^5.2.0development
eslint
Environment
{
  "local_name": "eslint",
  "alias": false,
  "peer_metadata": null
}
^4.1.1development
istanbul
Environment
{
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  "alias": false,
  "peer_metadata": null
}
^0.4.5development
benchmark
Environment
{
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  "alias": false,
  "peer_metadata": null
}
^2.1.4development
uglify-js
Environment
{
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  "alias": false,
  "peer_metadata": null
}
^3.0.1development
browserify
Environment
{
  "local_name": "browserify",
  "alias": false,
  "peer_metadata": null
}
^16.2.2development
codemirror
Environment
{
  "local_name": "codemirror",
  "alias": false,
  "peer_metadata": null
}
^5.13.4development
fast-check
Environment
{
  "local_name": "fast-check",
  "alias": false,
  "peer_metadata": null
}
1.1.3development

Distribution files

1 collected
Distribution 1

Source distribution

Source file
Checksums from source
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Repository

PENDING
nodeca/js-yaml

Shared repository data · GitHub

License detected in repository
Not collected

Metadata history

Meaningful changes
Current collected state Current

Observed since 20 Oct, 08:15 UTC

No superseded metadata states collected. Unchanged observations do not create new revisions.

Record identity

package_version:657aaa6830ed83693a232225d175acedadd1a0a349bd07c6290d8ab89c346b89

Other collected versions

5.5.015 Oct5.4.35 Oct5.4.213 Sept3.15.226 Aug4.3.226 Aug5.4.126 AugView all collected versions →