eslint-plugin-sort-keys-plus

eslint-plugin-sort-keys-plus

Fork of eslint rule that sorts keys in objects (https://eslint.org/docs/rules/sort-keys) with autofix enabled

Installation

You'll first need to install ESLint:

$ npm i eslint --save-dev

Next, install eslint-plugin-sort-keys-plus:

$ npm install eslint-plugin-sort-keys-plus --save-dev

Note: If you installed ESLint globally (using the -g flag) then you must also install eslint-plugin-sort-keys-plus globally.

Usage

Add sort-keys-plus to the plugins section of your .eslintrc configuration file. You can omit the eslint-plugin- prefix:

{
  "plugins": [
    "sort-keys-plus"
  ]
}

Then add sort-keys-plus rule under the rules section.

{
    "rules": {
        "sort-keys-plus/sort-keys": "warn"
    }
}

Often it makes sense to enable sort-keys-plus only for certain files/directories. For cases like that, use override key of eslint config:

{
  "rules": {
    // ...
  },
  "overrides": [
    {
      "files": ["src/alphabetical.js", "bin/*.js", "lib/*.js"],
      "rules": {
        "sort-keys-plus/sort-keys-plus": "warn"
      }
    }
  ]
}

In some cases, there should be a specific order for some properties of an object, such as with mongodb aggregations. For that, use the override key of the configuration:

{
  "rules": {
    "sort-keys-plus/sort-keys": ["warn", "asc", {
      "overrides": [
        {
          "properties": ["$lookup"],
          "order": ["from", "localField", "foreignField", "as"]
        }
      ]
    }]
  }
}

Rule configuration

For available config options, see official sort-keys reference. All options supported by sort-keys are supported by sort-keys-plus.

{
  "sort-keys-shorthand/sort-keys-shorthand": [
    "error",
    "asc",
    {
      "caseSensitive": true,
      "minKeys": 2,
      "natural": false,
      "ignoreSingleLine": false,
      "allCaps": "ignore",
      "shorthand": "ignore",
      "overrides": [],
    }
  ]
}

Additional properties that can be set in the 2nd option object supported are as follows:

• ignoreSingleline - if true, this rule is ignored on single line objects. Default is false.
• allCaps handling for ALL_CAPS properties
  • ignore no rules for all caps
  • first all caps properties must be first
  • last all caps properties must be last
• shorthand handling for shorthand properties
  • ignore no rules for shorthands
  • first shorthand properties must be first
  • last shrothand properties must be last

shorthand is checked after allCaps, so ALL_CAPS will be before shorthand when both are 'first'.

• overrides allows custom orders for specific sets of keys, or sub-objects with a specific parent key. See below for configuration.

ignoreSingleLine

Examples of incorrect code for the {ignoreSingleLine: true} option:

/*eslint sort-keys-plus/sort-keys: ["error", "asc", {ignoreSingleLine: true}]*/
/*eslint-env es6*/
let obj = {
  e: 1,
  c: 3,
  C: 4,
  b: 2
};

Examples of correct code for the {ignoreSingleLine: true} option:

/*eslint sort-keys-plus/sort-keys: ["error", "asc", {ignoreSingleLine: true}]*/
/*eslint-env es6*/
let obj = { e: 1, b: 2, c: 3, C: 4 };

allCaps

Examples of incorrect code for the {allCaps: 'first'} option:

/*eslint sort-keys-plus/sort-keys: ["error", "asc", {allCaps: 'first'}]*/
/*eslint-env es6*/
let obj = {
  a: 1,
  B_CONSTANT: 2, // not sorted correctly (should be 1st key)
  c: 3,
  d: 4
};

Examples of correct code for the {allCaps: 'first'} option:

/*eslint sort-keys-plus/sort-keys: ["error", "asc", {allCaps: 'first'}]*//
/*eslint-env es6*/
let obj = {
    B_CONSTANT: 2,
    a: 1,
    c: 3,
};

shorthand

Examples of incorrect code for the {shorthand: 'first'} option:

/*eslint sort-keys-plus/sort-keys: ["error", "asc", {shorthand: 'first'}]*/
/*eslint-env es6*/
const b = 2;
let obj = {
  a: 1,
  b, // not sorted correctly (should be 1st key)
  c: 3,
  d: 4
};

Examples of correct code for the {shorthand: 'first'} option:

/*eslint sort-keys-plus/sort-keys: ["error", "asc", {shorthand: 'first'}]*//
/*eslint-env es6*/
const b = 2;
let obj = {
    b,
    a: 1,
    c: 3,
};

overrides

Configuration:

      "overrides": [
        {
          "order": ["title", "description"],
          "message": "`title` should be before `description`",
        },
        {
          "
        }
      ],

• order define the property keys that should be ordered
• properties define parent property key for this rule. If this is not provided, the override will apply to all objects with a subset of the keys in order
• message optional custom message when the rule is violated

Examples of incorrect code for the {overrides: [{order: ['b', 'a', 'd']}]} option:

/*eslint sort-keys-plus/sort-keys: ["error", "asc", {overrides: [{order: ['b', 'a', 'd']}]}]*/
/*eslint-env es6*/
let obj = {
  a: 1,
  b: 2, // not sorted correctly (should be 1st key)
  d: 4
};

Examples of correct code for the {overrides: [{order: ['b', 'a', 'd']}]} option:

/*eslint sort-keys-plus/sort-keys: ["error", "asc", {overrides: [{order: ['b', 'a', 'd']}]}]*/
/*eslint-env es6*/
let obj = {
  b: 2,
  a: 1,
  d: 4
};
// has additional properties
let obj = {
  a: 1,
  b: 2,
  c: 3,
  d: 4
};

Examples of incorrect code for the {overrides: [{properties: ['a'], order: ['b', 'a', 'd']}]} option:

/*eslint sort-keys-plus/sort-keys: ["error", "asc", {overrides: [{properties: ['a'], order: ['b', 'a', 'd']}]}]*/
/*eslint-env es6*/
let obj = { a:
  {
    a: 1,
    b: 2, // not sorted correctly (should be 1st key)
    c: 3,
    d: 4  // not sorted correctly (should be 3rd key)
  };

Examples of correct code for the {overrides: [{overrides: [{properties: ['a'], order: ['b', 'a', 'd']}]} option:

/*eslint sort-keys-plus/sort-keys: ["error", "asc", {overrides: [{overrides: [{properties: ['a'], order: ['b', 'a', 'd']}]}*/
/*eslint-env es6*/
let obj = {
  b: 2,
  a: 1,
  d: 4,
  c: 3
};