Question 1

eslint-plugin-json or jsonlint: which is better for JSON validation?

Accepted Answer

eslint-plugin-json integrates seamlessly if you're already using ESLint, providing a unified workflow for JavaScript and JSON. jsonlint is a standalone tool better for pure JSON validation without ESLint. Choose eslint-plugin-json for consistency in ESLint-based projects; jsonlint for lightweight, tool-agnostic validation.

Question 2

How to enable comments in JSON files with eslint-plugin-json?

Accepted Answer

Use the 'allowComments' option in your ESLint config, such as setting 'json/*': ['error', {allowComments: true}]. Alternatively, extend the 'recommended-with-comments' config for a pre-configured setup that permits comments in JSON files.

Question 3

Does eslint-plugin-json support JSON schemas?

Accepted Answer

No, eslint-plugin-json does not support JSON schema validation. It focuses on syntax errors, duplicate keys, and similar issues using VSCode's parser. For schema-based validation, you'd need additional tools or plugins specific to JSON schemas.

Question 4

Can I use eslint-plugin-json in VSCode without ESLint?

Accepted Answer

No, eslint-plugin-json requires ESLint to run. However, VSCode has built-in JSON validation, and you can configure the ESLint extension to lint JSON files with this plugin, but it depends on having ESLint set up in your project.

Question 5

How to fix duplicate key errors reported by eslint-plugin-json?

Accepted Answer

Manually edit the JSON file to remove or rename duplicate keys, as the plugin only reports errors and lacks autofix capabilities. Correct the JSON structure based on the linting output from ESLint runs.

Question 6

Is eslint-plugin-json compatible with ESLint version 8?

Accepted Answer

eslint-plugin-json v4 or newer is designed for ESLint v9 and above. For ESLint v8, you might need an older version, but check the GitHub repository for compatibility, as support may vary and legacy configs are provided.

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