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/lib
/node_modules
.idea

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The MIT License (MIT)
Copyright (c) 2019 Ely.by <team@ely.by>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# Ely.by ESLint rules
Set of ESLint rules used in development of Ely.by JS projects. Contains rules for pure JS, JSX, ReactJS and TS.
## Installation
First of all install Ely.by ESLint plugin and `eslint` peer dependency via preferred package manager:
```sh
# NPM users:
npm install @elyby/eslint-plugin eslint --save-dev
# Yarn users:
yarn add -D @elyby/eslint-plugin eslint
```
Then add the following configuration to your `.eslintrc.js` file:
```js
module.exports = {
extends: [
'plugin:@elyby/config',
],
}
```
And that's it!
You may still wish to override some of our rules, as well as the rest of our eslint configuration settings.
For example, you can specify the preferred `env` for eslint:
```js
module.exports = {
// ...rest of the configuration
env: {
browser: true,
es6: true,
},
};
```
## Using our custom fixers
First of all, you must install Ely.by's ESLint plugin as described in the [installation chapter](#installation).
After that you can enable our custom rules with defining our plugin in `plugins` section:
```js
module.exports = {
// ...rest of the configuration
plugins: [
'@elyby',
],
};
```
After that all custom rules will be available for use.
### List of supported rules
* [@elyby/jsx-closing-bracket-location](docs/rules/jsx-closing-bracket-location.md):
Validate closing bracket location in JSX
## License
Ely.by ESLint plugin is licensed under the [MIT License](LICENSE.md).

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module.exports = (api) => ({
presets: [
['@babel/preset-env', {
targets: {
node: api.env('test') ? 'current' : 8,
},
}],
['@babel/preset-typescript'],
],
});

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# Validate closing bracket location in JSX (@elyby/jsx-closing-bracket-location)
Enforce the closing bracket location for JSX multiline elements.
## Rule Details
This rule checks all JSX multiline elements and verifies the location of the closing bracket according to the Ely.by's
team preferences.
The rule is simple: if the first property is written on the same line as the component, it's considered to be inline
and the closing bracket should be placed immediately after the last property:
```js
<Component param={123} />
<Component param1={123} param2={{
key: 'value',
}} />
```
And vice versa: if the first property is written with a new line, the component is considered to be multi-line
and the closing bracket must be placed on the next line after the last property.
```js
<Component
param={123}
/>
<Comment
param1={123}
param2={{
key: 'value',
}}
/>
```
## When Not To Use It
If you follow the same formatting rules for component properties as our team.
## Further Reading
* [Inspired by the original rule from `eslint-plugin-react`](https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-closing-bracket-location.md).

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module.exports = {
clearMocks: true,
coverageDirectory: 'reports/coverage',
testEnvironment: 'node',
testMatch: [
'**/tests/**/*.[jt]s?(x)',
],
};

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{
"name": "@elyby/eslint-plugin",
"version": "0.1.0",
"description": "Shareable ESLint config for the Ely.by's projects",
"author": {
"name": "erickskrauch",
"email": "erickskrauch@ely.by",
"url": "https://github.com/erickskrauch"
},
"main": "lib/index.js",
"repository": "https://github.com/elyby/eslint-config.git",
"keywords": [
"eslint",
"eslintconfig",
"lint",
"ely",
"elyby"
],
"license": "MIT",
"scripts": {
"build": "babel src -d lib --extensions .ts,.js",
"test": "jest"
},
"dependencies": {
"@typescript-eslint/eslint-plugin": "^1.9.0",
"@typescript-eslint/parser": "^1.9.0",
"eslint-plugin-react": "^7.13.0"
},
"devDependencies": {
"@babel/cli": "^7.4.4",
"@babel/core": "^7.4.5",
"@babel/preset-env": "^7.4.4",
"@babel/preset-typescript": "^7.3.3",
"@types/eslint": "^4.16.6",
"@types/estree": "^0.0.39",
"@types/node": "^12.0.2",
"eslint": "^5.16.0",
"jest": "^24.8.0",
"typescript": "^3.4.5"
},
"peerDependencies": {
"eslint": ">=5.16.0"
}
}

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import { Linter } from 'eslint';
const config: Linter.Config = {
parser: '@typescript-eslint/parser',
parserOptions: {
sourceType: 'module',
ecmaVersion: 2018,
ecmaFeatures: {
jsx: true,
},
},
settings: {
react: {
version: 'detect',
},
},
// @ts-ignore
plugins: [
'@typescript-eslint',
'@elyby',
],
extends: [
'eslint:recommended',
'plugin:react/recommended',
],
rules: {
// possible errors (including eslint:recommended)
'valid-jsdoc': ['warn', {
requireParamDescription: false,
requireReturn: false,
requireReturnDescription: false,
prefer: {
returns: 'return',
},
preferType: {
String: 'string',
Object: 'object',
Number: 'number',
Function: 'function',
},
}],
// best practice
'block-scoped-var': 'error',
'curly': 'error',
'default-case': 'error',
'dot-location': ['error', 'property'],
'dot-notation': 'error',
'eqeqeq': ['error', 'smart'],
'no-alert': 'error',
'no-caller': 'error',
'no-case-declarations': 'error',
'no-div-regex': 'error',
'no-else-return': 'error',
'no-empty-pattern': 'error',
'no-eq-null': 'error',
'no-eval': 'error',
'no-extend-native': 'error',
'no-extra-bind': 'warn',
'no-fallthrough': 'error',
'no-floating-decimal': 'warn',
'no-implied-eval': 'error',
'no-invalid-this': 'off',
'no-labels': 'error',
'no-lone-blocks': 'warn',
'no-loop-func': 'error',
'no-multi-spaces': 'error',
'no-multi-str': 'error',
'no-native-reassign': 'error',
'no-new-wrappers': 'warn',
'no-new': 'warn',
'no-octal-escape': 'warn',
'no-octal': 'error',
'no-proto': 'error',
'no-redeclare': 'warn',
'no-script-url': 'error',
'no-self-compare': 'error',
'no-sequences': 'error',
'no-throw-literal': 'error',
'no-unused-expressions': ['warn', {
allowShortCircuit: true,
allowTernary: true,
}],
'no-useless-call': 'warn',
'no-useless-concat': 'warn',
'no-void': 'error',
'no-with': 'error',
'radix': 'error',
'wrap-iife': 'error',
'yoda': 'warn',
'no-constant-condition': 'error',
// strict mode
'strict': ['warn', 'never'], // allow babel to do it for us
// variables
'no-catch-shadow': 'off',
'no-delete-var': 'error',
'no-label-var': 'error',
'no-shadow-restricted-names': 'error',
'no-shadow': 'off',
'no-undef-init': 'error',
'no-undef': 'error',
'no-use-before-define': ['warn', 'nofunc'],
// CommonJS
'no-mixed-requires': 'warn',
'no-path-concat': 'warn',
// stylistic
'array-bracket-spacing': 'off', // disable because we want spaces on destructured arrays
'block-spacing': ['error', 'never'],
'brace-style': ['error', '1tbs', {
allowSingleLine: true,
}],
'comma-spacing': 'error',
'comma-style': 'error',
'comma-dangle': ['warn', 'always-multiline'],
'computed-property-spacing': 'error',
'consistent-this': ['error', 'that'],
'camelcase': 'warn',
'eol-last': 'warn',
'id-length': ['error', {
min: 2,
exceptions: ['x', 'y', 'i', '$'],
}],
'indent': ['error', 4, {
SwitchCase: 1,
}],
'jsx-quotes': 'error',
'key-spacing': ['error', {
mode: 'minimum',
}],
'linebreak-style': 'error',
'max-depth': 'error',
'new-cap': 'error',
'new-parens': 'error',
'no-array-constructor': 'warn',
'no-bitwise': 'warn',
'no-lonely-if': 'error',
'no-negated-condition': 'warn',
'no-nested-ternary': 'error',
'no-new-object': 'error',
'no-spaced-func': 'error',
'no-trailing-spaces': 'warn',
'no-unneeded-ternary': 'warn',
'one-var': ['error', 'never'],
'operator-assignment': ['warn', 'always'],
'operator-linebreak': ['error', 'before'],
'padded-blocks': ['warn', 'never'],
'quote-props': ['warn', 'as-needed'],
'quotes': ['warn', 'single'],
'semi': 'error',
'semi-spacing': 'error',
'keyword-spacing': 'warn',
'space-before-blocks': 'error',
'space-before-function-paren': ['error', {
anonymous: 'never',
named: 'never',
asyncArrow: 'always',
}],
'space-in-parens': 'warn',
'space-infix-ops': 'error',
'space-unary-ops': 'error',
'spaced-comment': 'warn',
// es6
'arrow-body-style': 'warn',
'arrow-parens': 'error',
'arrow-spacing': 'error',
'constructor-super': 'error',
'generator-star-spacing': 'warn',
'no-class-assign': 'error',
'no-const-assign': 'error',
'no-dupe-class-members': 'error',
'no-this-before-super': 'error',
'no-var': 'warn',
'object-shorthand': 'warn',
'prefer-arrow-callback': 'warn',
'prefer-const': 'warn',
'prefer-reflect': 'warn',
'prefer-spread': 'warn',
'prefer-template': 'warn',
'require-yield': 'error',
// react
'react/display-name': 'warn',
'react/forbid-prop-types': 'warn',
'react/jsx-boolean-value': 'warn',
'react/jsx-closing-bracket-location': 'off',
'react/jsx-curly-spacing': 'warn',
'react/jsx-handler-names': ['warn', {
eventHandlerPrefix: 'on',
eventHandlerPropPrefix: 'on',
}],
'react/jsx-indent-props': 'warn',
'react/jsx-key': 'warn',
'react/jsx-max-props-per-line': 'off',
'react/jsx-no-bind': ['error', {
allowArrowFunctions: true,
}],
'react/jsx-no-duplicate-props': 'warn',
'react/jsx-no-literals': 'off',
'react/jsx-no-undef': 'warn',
'react/jsx-pascal-case': 'warn',
'react/jsx-uses-react': 'warn',
'react/jsx-uses-vars': 'warn',
'react/jsx-no-comment-textnodes': 'warn',
'react/jsx-tag-spacing': ['warn', {
beforeClosing: 'never',
}],
'react/jsx-wrap-multilines': 'warn',
'react/no-deprecated': 'warn',
'react/no-did-mount-set-state': 'warn',
'react/no-did-update-set-state': 'warn',
'react/no-direct-mutation-state': 'warn',
'react/require-render-return': 'warn',
'react/no-is-mounted': 'warn',
'react/no-multi-comp': 'warn',
'react/no-string-refs': 'warn',
'react/no-unknown-property': 'warn',
'react/prefer-es6-class': 'warn',
'react/react-in-jsx-scope': 'off',
'react/self-closing-comp': 'warn',
'react/sort-comp': ['warn', {
order: ['lifecycle', 'render', 'everything-else'],
}],
// Ely.by's custom rules
'@elyby/jsx-closing-bracket-location': 'warn',
},
overrides: [
{
files: ['*.ts', '*.tsx'],
rules: {
'camelcase': 'off',
'indent': 'off',
'no-array-constructor': 'off',
'no-unused-vars': 'off',
'react/prop-types': 'off',
'@typescript-eslint/adjacent-overload-signatures': 'error',
'@typescript-eslint/array-type': ['error', 'generic'],
'@typescript-eslint/ban-types': 'error',
'@typescript-eslint/camelcase': 'error',
'@typescript-eslint/class-name-casing': 'error',
'@typescript-eslint/explicit-member-accessibility': 'error',
'@typescript-eslint/indent': 'error',
'@typescript-eslint/interface-name-prefix': 'error',
'@typescript-eslint/member-delimiter-style': 'error',
'@typescript-eslint/no-angle-bracket-type-assertion': 'error',
'@typescript-eslint/no-array-constructor': 'error',
'@typescript-eslint/no-empty-interface': 'error',
'@typescript-eslint/no-inferrable-types': 'error',
'@typescript-eslint/no-misused-new': 'error',
'@typescript-eslint/no-namespace': 'error',
'@typescript-eslint/no-object-literal-type-assertion': 'error',
'@typescript-eslint/no-parameter-properties': 'error',
'@typescript-eslint/no-triple-slash-reference': 'error',
'@typescript-eslint/no-unused-vars': 'warn',
'@typescript-eslint/no-use-before-define': 'error',
'@typescript-eslint/no-var-requires': 'error',
'@typescript-eslint/prefer-for-of': 'warn',
'@typescript-eslint/prefer-interface': 'error',
'@typescript-eslint/prefer-namespace-keyword': 'error',
'@typescript-eslint/type-annotation-spacing': 'error',
},
},
],
};
export default config;

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import allRules from './rules';
import config from './configs/all';
export const rules = allRules;
export const configs = {
config,
};

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import { Rule } from 'eslint';
import { default as reactPropsBrackets } from './jsx-closing-bracket-location';
const rules: { [key: string]: Rule.RuleModule } = {
'jsx-closing-bracket-location': reactPropsBrackets,
};
export default rules;

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import { Node } from 'estree';
import { Rule } from 'eslint';
import { JSXOpeningElement } from '@babel/types';
const RIGHT_AFTER_PROP_TEXT = 'right after the last prop';
const ON_THE_NEXT_LINE_TEXT = 'on the next line';
const rule: Rule.RuleModule = {
meta: {
docs: {
description: 'Validate closing bracket location in JSX',
category: 'Stylistic Issues',
recommended: false,
},
},
create: (context) => ({
'JSXOpeningElement:exit': (node: Node|JSXOpeningElement) => {
const { start: tagStart, end: componentEnd } = node.loc!;
let expectedClosingBracketLine: number;
const isSelfClosing = (node as JSXOpeningElement).selfClosing;
const attributes = (node as JSXOpeningElement).attributes;
if (attributes.length === 0) {
expectedClosingBracketLine = tagStart.line;
} else {
const { start: firstPropStart } = attributes[0].loc!;
const { end: lastPropEnd } = attributes[attributes.length - 1].loc!;
expectedClosingBracketLine = lastPropEnd.line;
if (firstPropStart.line !== tagStart.line) {
expectedClosingBracketLine++;
}
}
if (componentEnd.line === expectedClosingBracketLine) {
return;
}
context.report({
loc: {
start: context.getSourceCode().getLastToken(node as Node, isSelfClosing ? 2 : 1)!.loc.end,
end: componentEnd,
},
message: 'The closing bracket must be placed {{ at }}',
data: {
at: expectedClosingBracketLine > componentEnd.line ? ON_THE_NEXT_LINE_TEXT : RIGHT_AFTER_PROP_TEXT,
},
});
},
}),
};
export default rule;

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// -----------------------------------------------------------------------------
// Requirements
// -----------------------------------------------------------------------------
import { RuleTester } from 'eslint';
import rule from './../../../src/rules/jsx-closing-bracket-location';
const parserOptions = {
ecmaVersion: 2018,
ecmaFeatures: {
jsx: true,
},
};
const MESSAGE_ON_THE_NEXT_LINE = 'The closing bracket must be placed on the next line';
const MESSAGE_RIGHT_AFTER_PROP = 'The closing bracket must be placed right after the last prop';
// -----------------------------------------------------------------------------
// Tests
// -----------------------------------------------------------------------------
const ruleTester = new RuleTester({parserOptions});
ruleTester.run('react-props-brackets', rule, {
valid: [
'<Component></Component>',
'<Component />',
'<Component prop={"value"}></Component>',
'<Component {...props1}></Component>',
'<Component prop={"value"}/>',
'<Component {...props1}/>',
{
code: [
'<Component prop={{',
' key: "value",',
'}}/>',
].join('\n'),
},
{
code: [
'<Component',
' prop={{',
' key: "value",',
' }}',
'/>',
].join('\n'),
},
{
code: [
'<Component prop={{',
' key: "value",',
'}}></Component>',
].join('\n'),
},
{
code: [
'<Component',
' prop={{',
' key: "value",',
' }}',
'></Component>',
].join('\n'),
},
],
invalid: [
{
code: [
'<Component',
'></Component>',
].join('\n'),
errors: [{
message: MESSAGE_RIGHT_AFTER_PROP,
line: 1,
column: 11,
endLine: 2,
endColumn: 2,
}],
},
{
code: [
'<Component',
'/>',
].join('\n'),
errors: [{
message: MESSAGE_RIGHT_AFTER_PROP,
line: 1,
column: 11,
endLine: 2,
endColumn: 3,
}],
},
{
code: [
'<Component prop={"value"}',
'></Component>',
].join('\n'),
errors: [{
message: MESSAGE_RIGHT_AFTER_PROP,
line: 1,
column: 26,
endLine: 2,
endColumn: 2,
}],
},
{
code: [
'<Component prop={"value"}',
'/>',
].join('\n'),
errors: [{
message: MESSAGE_RIGHT_AFTER_PROP,
line: 1,
column: 26,
endLine: 2,
endColumn: 3,
}],
},
{
code: [
'<Component prop={{',
' key: "value",',
'}}',
'/>',
].join('\n'),
errors: [{
message: MESSAGE_RIGHT_AFTER_PROP,
line: 3,
column: 3,
endLine: 4,
endColumn: 3,
}],
},
{
code: [
'<Component',
' prop={{',
' key: "value",',
' }}/>',
].join('\n'),
errors: [{
message: MESSAGE_ON_THE_NEXT_LINE,
line: 4,
column: 7,
endLine: 4,
endColumn: 9,
}],
},
{
code: [
'<Component prop={{',
' key: "value",',
'}}',
'></Component>',
].join('\n'),
errors: [{
message: MESSAGE_RIGHT_AFTER_PROP,
line: 3,
column: 3,
endLine: 4,
endColumn: 2,
}],
},
{
code: [
'<Component',
' prop={{',
' key: "value",',
' }}></Component>',
].join('\n'),
errors: [{
message: MESSAGE_ON_THE_NEXT_LINE,
line: 4,
column: 7,
endLine: 4,
endColumn: 8,
}],
},
],
});

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{
"compilerOptions": {
"target": "esnext",
"lib": [
"es7",
"dom",
"dom.iterable"
],
"jsx": "preserve",
"declaration": false,
"skipLibCheck": false,
"noEmit": true,
"strict": true,
"module": "ESNext",
"moduleResolution": "node",
"baseUrl": "src",
"allowSyntheticDefaultImports": true,
"esModuleInterop": true,
"forceConsistentCasingInFileNames": true
},
"include": [
"src"
]
}

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