eslint-plugin-jsonc

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

DISABLE_LINTERS:
  - JSON_JSONLINT

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": [
                  "plugin:jsonc/recommended-with-json"
              ],
              "parser": "jsonc-eslint-parser",
                  "parserOptions": {
                      "jsonSyntax": "JSON"
              }
          },
          {
              "files": [".jsonc"],
              "extends": [
                  "plugin:jsonc/recommended-with-jsonc"
              ],
              "parser": "jsonc-eslint-parser",
                  "parserOptions": {
                      "jsonSyntax": "JSONC"
              }
          },
          {
              "files": ["*.json5"],
              "extends": [
                  "plugin:jsonc/recommended-with-json5"
              ],
              "parser": "jsonc-eslint-parser",
                  "parserOptions": {
                      "jsonSyntax": "JSON5"
              }
          }
      ]
  }

eslint-plugin-jsonc documentation

Version in MegaLinter: 2.12.2
Visit Official Web Site
See How to configure eslint-plugin-jsonc rules
- If custom .eslintrc-json.json config file isn't found, .eslintrc-json.json will be used
See How to disable eslint-plugin-jsonc rules in files
See How to ignore files and directories with eslint-plugin-jsonc
- You can define a .eslintignore file to ignore files and folders
See Index of problems detected by eslint-plugin-jsonc

Configuration in MegaLinter

Enable eslint-plugin-jsonc by adding JSON_ESLINT_PLUGIN_JSONC in ENABLE_LINTERS variable
Disable eslint-plugin-jsonc by adding JSON_ESLINT_PLUGIN_JSONC in DISABLE_LINTERS variable

Enable autofixes by adding JSON_ESLINT_PLUGIN_JSONC in APPLY_FIXES variable

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"`
JSON_ESLINT_PLUGIN_JSONC_FILTER_REGEX_INCLUDE	Custom regex including filter Ex: `(src\\|lib)`	Include every file
JSON_ESLINT_PLUGIN_JSONC_FILTER_REGEX_EXCLUDE	Custom regex excluding filter Ex: `(test\\|examples)`	Exclude no file
JSON_ESLINT_PLUGIN_JSONC_CLI_LINT_MODE	Override default CLI lint mode - `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	`list_of_files`
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`
JSON_ESLINT_PLUGIN_JSONC_DISABLE_ERRORS_IF_LESS_THAN	Maximum number of errors allowed	`0`
JSON_ESLINT_PLUGIN_JSONC_CLI_EXECUTABLE	Override CLI executable	`['eslint']`

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
all	Default MegaLinter Flavor	121
c_cpp	Optimized for pure C/C++ projects	54
ci_light	Optimized for CI items (Dockerfile, Jenkinsfile, JSON/YAML schemas,XML	22
cupcake	MegaLinter for the most commonly used languages	83
documentation	MegaLinter for documentation projects	50
dotnet	Optimized for C, C++, C# or VB based projects	63
dotnetweb	Optimized for C, C++, C# or VB based projects with JS/TS	72
go	Optimized for GO based projects	52
java	Optimized for JAVA based projects	53
javascript	Optimized for JAVASCRIPT or TYPESCRIPT based projects	59
php	Optimized for PHP based projects	53
python	Optimized for PYTHON based projects	61
ruby	Optimized for RUBY based projects	50
rust	Optimized for RUST based projects	50
salesforce	Optimized for Salesforce based projects	54
swift	Optimized for SWIFT based projects	50
terraform	Optimized for TERRAFORM based projects	54

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

Output:
  -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 and eslint-enable directives
  --report-unused-disable-directives-severity String  Chooses severity level for reporting unused eslint-disable and eslint-enable directives - either: off, warn, error, 0, 1, or 2

Caching:
  --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

Miscellaneous:
  --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

NPM packages (node.js):