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eslint-plugin-jsonc uses eslint to lint json, jsonc and json5 (extended JSON with comments & more).

  • To override default configuration, create a .eslintrc-json.json custom configuration file applicable to your project
  • If you have .json files with comments in your project, you may disable jsonlint to avoid false positive errors, by adding the following content in your .mega-linter.yml configuration file
  • If you have your own local .eslintrc.json (or .yaml or .js equivalent) config in your project, you must
    • add JSON_ESLINT_PLUGIN_JSONC_FILE_NAME: .eslintrc.json (or .yaml or .js equivalent) in your .mega-linter.yml config file
    • add overrides property in it

      See code

            "overrides": [
                    "files": [".json"],
                    "extends": [
                    "parser": "jsonc-eslint-parser",
                        "parserOptions": {
                            "jsonSyntax": "JSON"
                    "files": [".jsonc"],
                    "extends": [
                    "parser": "jsonc-eslint-parser",
                        "parserOptions": {
                            "jsonSyntax": "JSONC"
                    "files": ["*.json5"],
                    "extends": [
                    "parser": "jsonc-eslint-parser",
                        "parserOptions": {
                            "jsonSyntax": "JSON5"

eslint-plugin-jsonc documentation

eslint-plugin-jsonc - GitHub

Configuration in MegaLinter

Variable Description Default value
JSON_ESLINT_PLUGIN_JSONC_ARGUMENTS User custom arguments to add in linter CLI call
Ex: -s --foo "bar"
JSON_ESLINT_PLUGIN_JSONC_COMMAND_REMOVE_ARGUMENTS User custom arguments to remove from command line before calling the linter
Ex: -s --foo "bar"
Ex: (src\|lib)
Include every file
Ex: (test\|examples)
Exclude no file
- file: Calls the linter for each file
- list_of_files: Call the linter with the list of files as argument
- project: Call the linter from the root of the project
JSON_ESLINT_PLUGIN_JSONC_FILE_EXTENSIONS Allowed file extensions. "*" matches any extension, "" matches empty extension. Empty list excludes all files
Ex: [".py", ""]
[".json", ".json5", ".jsonc"]
JSON_ESLINT_PLUGIN_JSONC_FILE_NAMES_REGEX File name regex filters. Regular expression list for filtering files by their base names using regex full match. Empty list includes all files
Ex: ["Dockerfile(-.+)?", "Jenkinsfile"]
Include every file
JSON_ESLINT_PLUGIN_JSONC_PRE_COMMANDS List of bash commands to run before the linter None
JSON_ESLINT_PLUGIN_JSONC_POST_COMMANDS List of bash commands to run after the linter None
JSON_ESLINT_PLUGIN_JSONC_UNSECURED_ENV_VARIABLES List of env variables explicitly not filtered before calling JSON_ESLINT_PLUGIN_JSONC and its pre/post commands None
JSON_ESLINT_PLUGIN_JSONC_CONFIG_FILE eslint-plugin-jsonc configuration file nameUse LINTER_DEFAULT to let the linter find it .eslintrc-json.json
JSON_ESLINT_PLUGIN_JSONC_RULES_PATH Path where to find linter configuration file Workspace folder, then MegaLinter default rules
JSON_ESLINT_PLUGIN_JSONC_DISABLE_ERRORS Run linter but consider errors as warnings false

IDE Integration

Use eslint-plugin-jsonc in your favorite IDE to catch errors before MegaLinter !

IDE Extension Name Install
Visual Studio Code vscode-eslint Visit Web Site

MegaLinter Flavours

This linter is available in the following flavours

Flavor Description Embedded linters Info
all Default MegaLinter Flavor 117 Docker Image Size (tag) Docker Pulls
ci_light Optimized for CI items (Dockerfile, Jenkinsfile, JSON/YAML schemas,XML 22 Docker Image Size (tag) Docker Pulls
cupcake MegaLinter for the most commonly used languages 85 Docker Image Size (tag) Docker Pulls
documentation MegaLinter for documentation projects 51 Docker Image Size (tag) Docker Pulls
dotnet Optimized for C, C++, C# or VB based projects 63 Docker Image Size (tag) Docker Pulls
dotnetweb Optimized for C, C++, C# or VB based projects with JS/TS 72 Docker Image Size (tag) Docker Pulls
go Optimized for GO based projects 53 Docker Image Size (tag) Docker Pulls
java Optimized for JAVA based projects 55 Docker Image Size (tag) Docker Pulls
javascript Optimized for JAVASCRIPT or TYPESCRIPT based projects 60 Docker Image Size (tag) Docker Pulls
php Optimized for PHP based projects 54 Docker Image Size (tag) Docker Pulls
python Optimized for PYTHON based projects 62 Docker Image Size (tag) Docker Pulls
ruby Optimized for RUBY based projects 51 Docker Image Size (tag) Docker Pulls
rust Optimized for RUST based projects 51 Docker Image Size (tag) Docker Pulls
salesforce Optimized for Salesforce based projects 54 Docker Image Size (tag) Docker Pulls
swift Optimized for SWIFT based projects 51 Docker Image Size (tag) Docker Pulls
terraform Optimized for TERRAFORM based projects 55 Docker Image Size (tag) Docker Pulls

Behind the scenes

How are identified applicable files

  • File extensions: .json, .json5, .jsonc

How the linting is performed

  • eslint-plugin-jsonc is called once with the list of files as arguments (list_of_files CLI lint mode)

Example calls

eslint myfile.json
eslint -c .eslintrc-json.json --no-eslintrc --no-ignore myfile.json
eslint -c .eslintrc-json.json --no-eslintrc --no-ignore myfile.json5
eslint -c .eslintrc-json.json --no-eslintrc --no-ignore myfile.jsonc
eslint --fix -c .eslintrc-json.json --no-eslintrc --no-ignore myfile.json

Help content

eslint [options] file.js [file.js] [dir]

Basic configuration:
  --no-eslintrc                   Disable use of configuration from .eslintrc.*
  -c, --config path::String       Use this configuration, overriding .eslintrc.* config options if present
  --env [String]                  Specify environments
  --ext [String]                  Specify JavaScript file extensions
  --global [String]               Define global variables
  --parser String                 Specify the parser to be used
  --parser-options Object         Specify parser options
  --resolve-plugins-relative-to path::String  A folder where plugins should be resolved from, CWD by default

Specify Rules and Plugins:
  --plugin [String]               Specify plugins
  --rule Object                   Specify rules
  --rulesdir [path::String]       Load additional rules from this directory. Deprecated: Use rules from plugins

Fix Problems:
  --fix                           Automatically fix problems
  --fix-dry-run                   Automatically fix problems without saving the changes to the file system
  --fix-type Array                Specify the types of fixes to apply (directive, problem, suggestion, layout)

Ignore Files:
  --ignore-path path::String      Specify path of ignore file
  --no-ignore                     Disable use of ignore files and patterns
  --ignore-pattern [String]       Pattern of files to ignore (in addition to those in .eslintignore)

Use stdin:
  --stdin                         Lint code provided on <STDIN> - default: false
  --stdin-filename String         Specify filename to process STDIN as

Handle Warnings:
  --quiet                         Report errors only - default: false
  --max-warnings Int              Number of warnings to trigger nonzero exit code - default: -1

  -o, --output-file path::String  Specify file to write report to
  -f, --format String             Use a specific output format - default: stylish
  --color, --no-color             Force enabling/disabling of color

Inline configuration comments:
  --no-inline-config              Prevent comments from changing config or rules
  --report-unused-disable-directives  Adds reported errors for unused eslint-disable directives

  --cache                         Only check changed files - default: false
  --cache-file path::String       Path to the cache file. Deprecated: use --cache-location - default: .eslintcache
  --cache-location path::String   Path to the cache file or directory
  --cache-strategy String         Strategy to use for detecting changed files in the cache - either: metadata or content - default: metadata

  --init                          Run config initialization wizard - default: false
  --env-info                      Output execution environment information - default: false
  --no-error-on-unmatched-pattern  Prevent errors when pattern is unmatched
  --exit-on-fatal-error           Exit with exit code 2 in case of fatal error - default: false
  --debug                         Output debugging information
  -h, --help                      Show help
  -v, --version                   Output the version number
  --print-config path::String     Print the configuration for the given file

Installation on mega-linter Docker image