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.eslintrc.js
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.eslintrc.js
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// __dirname 以下から全 `.gitignore` を探して `ignorePatterns` で使えるように変換する
const { readGitignoreFiles } = require('eslint-gitignore');
const spacingRules = require('./eslint/spacingRules');
const lineRules = require('./eslint/lineRules.js');
const commentRules = require('./eslint/commentRules.js');
const gitignore = readGitignoreFiles({ cwd: __dirname });
module.exports = {
env: {
es2021: true,
node : true,
},
extends: [
'eslint:recommended',
'plugin:@typescript-eslint/recommended',
'plugin:@next/next/recommended',
'plugin:jsdoc/recommended',
],
parser : '@typescript-eslint/parser',
parserOptions: {
ecmaVersion: 'latest',
sourceType : 'module',
},
plugins : ['@typescript-eslint', 'simple-import-sort', 'import', 'jsdoc'],
ignorePatterns: gitignore,
rules : {
indent : ['error', 2, { SwitchCase: 1 }],
'linebreak-style': ['error', 'unix'],
quotes : ['error', 'single'],
semi : ['error', 'always'],
...spacingRules,
...lineRules,
...commentRules,
/**
* Type定義のメンバの分割はセミコロンにする
*
* @see https://typescript-eslint.io/rules/member-delimiter-style/
*/
'@typescript-eslint/member-delimiter-style': 'error',
/**
* 関数の返却型を明示する
*
* @description
* allowExpressions: true の場合、宣言の一部である関数だけチェック。
*
* @see https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/eslint-plugin/docs/rules/explicit-function-return-type.md
*
*/
'@typescript-eslint/explicit-function-return-type': [
'error',
{
allowExpressions: true,
},
],
/**
* Disallow renaming import, export, and destructured assignments to the same name
*
* @see https://eslint.org/docs/latest/rules/no-useless-rename
*/
'no-useless-rename': 'error',
// "import React from 'react'"なしでもエラーが出ないようにする
'react/react-in-jsx-scope': 'off',
/**
* ヨーダ記法を使用しない
*
* @description
* exceptRange: 範囲を示す時はヨーダ記法を使用していい
*
* @see https://eslint.org/docs/rules/yoda#require-or-disallow-yoda-conditions-yoda
*/
yoda: ['error', 'never', { exceptRange: true }],
/**
* 命名規則
*
* @see https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/eslint-plugin/docs/rules/naming-convention.md
*/
'@typescript-eslint/naming-convention': [
'error',
{
selector: 'interface',
format : ['PascalCase'],
custom : {
regex: '^I[A-Z]',
match: true,
},
},
{
selector: 'class',
format : ['PascalCase'],
},
{
selector: 'typeAlias',
format : ['PascalCase'],
},
{
selector: 'function',
format : ['camelCase'],
},
{
selector: 'method',
format : ['camelCase'],
},
{
selector: 'variable',
format : ['camelCase', 'PascalCase', 'UPPER_CASE'],
},
{
selector: 'parameterProperty',
format : ['camelCase'],
},
{
selector : 'property',
format : ['camelCase', 'PascalCase'],
leadingUnderscore: 'allow',
},
{
selector : 'parameter',
format : ['camelCase'],
trailingUnderscore: 'allow',
},
{
selector: 'typeParameter',
format : ['PascalCase'],
prefix : ['T', 'U', 'K', 'P', 'E'],
},
],
/**
* switchのcase句でブロックを利用せずに変数や関数を定義するするのを禁止
*
* @see https://eslint.org/docs/rules/no-case-declarations#disallow-lexical-declarations-in-casedefault-clauses-no-case-declarations
*/
'no-case-declarations': 'error',
/**
* Sort Import
*/
'simple-import-sort/imports' : 'error',
'simple-import-sort/exports' : 'error',
'import/first' : 'error',
'import/newline-after-import': 'error',
'import/no-duplicates' : 'error',
/**
* Enforce consistent use of trailing commas in object and array literals
* Use a trailing comma whenever the object or array literal spans multiple lines
*
* @example
* ok
* const foo = { a, b }
* const foo = {
* a,
* b,
* }
*
* bad
* const foo = { a, b, }
* const foo = {
* a,
* b
* }
*/
'comma-dangle': ['error', 'always-multiline'],
/**
* Disallow the use of the 'any' type
*/
'@typescript-eslint/no-explicit-any': 'error',
},
overrides: [
{
files: '*.js',
rules: {
'@typescript-eslint/naming-convention': 'off',
'@typescript-eslint/no-var-requires' : 'off',
},
},
{
files: ['*.tsx'],
rules: {
'@typescript-eslint/naming-convention': [
'error',
{
selector: 'function',
format : ['camelCase', 'PascalCase'],
},
],
},
},
{
files: ['*.test.ts', '*.test.tsx'],
rules: {
/**
* Allow the use of 'any' in test code
*/
'@typescript-eslint/no-explicit-any': 'off',
},
},
],
};