Registry / testing / eslint-plugin-json-schema-validator

eslint-plugin-json-schema-validator

library6.2.0jsnpmunverified

ESLint plugin that validates JSON, JSONC, JSON5, YAML, TOML, JavaScript, and Vue custom blocks against JSON Schema. Current stable version is 6.2.0 (released 2025-06-10). Requires ESLint >=9.38.0 and Node.js >=20.19.0 (20.x), >=22.13.0 (22.x), or >=24. Actively maintained with monthly releases. Key differentiator: validates structured data formats using JSON Schema within ESLint flat config, supporting multiple data languages and schema from SchemaStore.

testing serialization

npm install eslint-plugin-json-schema-validator

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · ESLINT-PLUGIN-JSON

eslint-plugin-json-schema-validator

testingjavascriptv6.2.0

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

default

✓ import eslintPluginJsonSchemaValidator from 'eslint-plugin-json-schema-validator'

✗ const eslintPluginJsonSchemaValidator = require('eslint-plugin-json-schema-validator')

ESM-only since v6.0.0 with Node >=20.19.0. Default import provides the plugin object with configs.

configs.recommended

✓ export default [ ...eslintPluginJsonSchemaValidator.configs.recommended ]

✗ export default [ eslintPluginJsonSchemaValidator.configs.flat.recommended ]

Flat config only since v6.0.0. The flat/ prefix is deprecated but still works as alias.

rules

✓ import { rules } from 'eslint-plugin-json-schema-validator'

✗ import { rules } from 'eslint-plugin-json-schema-validator/rules'

Direct import of rules map for custom config is supported.

ESLint flat config using recommended configuration; validates JSON, YAML, and TOML against JSON Schema.

// eslint.config.js import eslintPluginJsonSchemaValidator from 'eslint-plugin-json-schema-validator'; export default [ ...eslintPluginJsonSchemaValidator.configs.recommended, { rules: { 'json-schema-validator/no-invalid': 'warn' } } ]; // Run: npx eslint --ext .json,.yaml,.toml src/

Debug

Known issues

breakingESLint plugin requires ESLint >=9.38.0 and Node.js >=20.19.0/22.13.0/>=24.0.0

fix

Update ESLint: npm install eslint@^9.38.0 --save-dev; ensure Node.js >=20.19.0 (20.x) or >=22.13.0 (22.x) or >=24.0.0.

affects: >=6.0.0

breakingv6.0.0 dropped support for older ESLint versions; requires flat config only (eslint.config.js).

fix

Migrate from .eslintrc to eslint.config.js using flat config format.

affects: >=6.0.0

breakingv6.0.0 replaced require() with ESM imports; CommonJS require() will fail.

fix

Convert all require('eslint-plugin-json-schema-validator') to import statements. Ensure package.json has 'type': 'module' or use .mjs extension.

affects: >=6.0.0

gotchaPlugin does not validate .js files by default; only JSON, YAML, TOML, and Vue SFC.

fix

If you need to validate JSON Schema in JS files, ensure they are processed by ESLint with appropriate parser settings (e.g., @babel/eslint-parser).

affects: >=0.0.0

deprecatedThe flat/ prefix in configs (e.g., configs['flat/recommended']) is deprecated in v6.

fix

Use configs.recommended directly instead of configs['flat/recommended'].

affects: >=6.0.0

gotchaSchemaStore URLs are normalized to www.schemastore.org; custom URLs may not be recognized.

fix

Ensure custom schema URLs are valid and not blocked by normalization. Use local schema files if normalization causes issues.

affects: >=5.5.0

Errors

Common errors & fixes

Error [ERR_REQUIRE_ESM]: require() of ES Module /path/to/node_modules/eslint-plugin-json-schema-validator/dist/index.js from /path/to/eslint.config.js not supported.

v6.0.0 is ESM-only, but eslint.config.js is being loaded via CommonJS (require).

fix

Rename eslint.config.js to eslint.config.mjs or add 'type': 'module' to package.json.

Error: Failed to load plugin 'json-schema-validator' declared in 'plugins': Cannot find module 'eslint-plugin-json-schema-validator'

Plugin is not installed or ESLint version <9.38.0 incompatibility with v6.

fix

Install or update: npm install eslint-plugin-json-schema-validator@latest --save-dev; ensure ESLint >=9.38.0.

Configuration for rule 'json-schema-validator/no-invalid' is invalid: Value 'warn' is not a valid severity level.

Severity must be 0, 1, 2, 'off', 'warn', or 'error'.

fix

Use 'warn' (string) or 1 (number) correctly: 'json-schema-validator/no-invalid': 'warn' (with quotes).

Upgrade

Version history

6.2.0latest on npm

Audit

Dependencies

eslintrequiredPeer dependency; plugin requires ESLint >=9.38.0 (flat config only).

Agent activity

6 hits · last 30 days

node

Resources

githubhttps://github.com/ota-meshi/eslint-plugin-json-schema-validator ↗

packagehttps://www.npmjs.com/package/eslint-plugin-json-schema-validator ↗

homepagehttps://ota-meshi.github.io/eslint-plugin-json-schema-validator/ ↗