Prettier Plugin: Remove Duplicate JSON Keys

Modified based on prettier-plugin-sort-json. A Prettier plugin that removes duplicate keys from JSON files and provides flexible sorting options.

Features

• Removes duplicate keys from JSON files
• Supports various sorting algorithms for JSON keys
• Configurable recursive sorting
• Case-insensitive sorting options
• Numeric and lexical sorting options

Installation

npm install --save-dev prettier-rm-duplicate-json-keys

Usage

Add the plugin to your Prettier configuration:

{
  "plugins": ["prettier-rm-duplicate-json-keys"],
  "jsonRecursiveSort": true,
  "jsonSortOrder": "lexical"
}

Configuration

Options

• jsonRecursiveSort (boolean, default: false)

  • When true, sorts JSON files recursively, including any nested properties

• jsonSortOrder (string, default: "lexical")

  • Specifies the sorting algorithm to use
  • Available options:
    • lexical: Standard alphabetical sorting
    • numeric: Numeric prefix sorting
    • caseInsensitiveLexical: Case-insensitive alphabetical sorting
    • caseInsensitiveNumeric: Case-insensitive numeric prefix sorting
    • reverseLexical: Reverse alphabetical sorting
    • reverseNumeric: Reverse numeric prefix sorting
    • caseInsensitiveReverseLexical: Case-insensitive reverse alphabetical sorting
    • caseInsensitiveReverseNumeric: Case-insensitive reverse numeric prefix sorting
    • none: No sorting

Example

Input JSON:

{
  "a": 1,
  "b": 2,
  "b": 3,
  "c": {
    "z": 1,
    "y": 2,
    "z": 3
  }
}

Output JSON (with jsonSortOrder: "lexical"):

{
  "a": 1,
  "b": 2,
  "c": {
    "y": 2,
    "z": 1
  }
}

Development

# Install dependencies
npm install

# Build the project
npm run build

License

ISC