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'use strict';
module.exports = {
env: {
es2017: true,
},
extends: [
'eslint:recommended',
'plugin:eslint-comments/recommended',
'plugin:promise/recommended',
'plugin:you-dont-need-lodash-underscore/compatible',
],
plugins: [
'eslint-comments',
'prefer-arrow',
'promise',
'you-dont-need-lodash-underscore',
],
rules: {
'array-bracket-newline': ['error', 'consistent'],
'array-bracket-spacing': 'error',
'array-element-newline': ['error', 'consistent'],
'arrow-body-style': 'error',
'arrow-parens': 'error',
'arrow-spacing': 'error',
'block-spacing': 'error',
'brace-style': ['error', '1tbs', {allowSingleLine: true}],
'camelcase': ['warn', {allow: ['^ace_', '^eejsBlock_', '^handleClientMessage_']}],
'comma-dangle': ['error', {
arrays: 'always-multiline',
objects: 'always-multiline',
imports: 'always-multiline',
exports: 'always-multiline',
// Trailing commas for function declarations and function calls is only supported in
// ECMAScript 2017 and newer.
functions: 'never',
}],
'comma-spacing': 'error',
'comma-style': 'error',
'computed-property-spacing': 'error',
'curly': ['error', 'multi-line', 'consistent'],
'dot-location': ['error', 'property'],
'dot-notation': 'error',
'eol-last': 'error',
'eqeqeq': ['error', 'always', {null: 'never'}],
'func-call-spacing': 'error',
'guard-for-in': 'error',
'implicit-arrow-linebreak': 'error',
'indent': ['error', 2, {
CallExpression: {
arguments: 2,
},
FunctionDeclaration: {
parameters: 2,
},
FunctionExpression: {
parameters: 2,
},
MemberExpression: 2,
SwitchCase: 1,
flatTernaryExpressions: true,
offsetTernaryExpressions: true,
}],
'key-spacing': 'error',
'keyword-spacing': 'error',
'linebreak-style': 'error',
'max-len': ['error', {code: 100, tabWidth: 2, ignoreUrls: true}],
'new-cap': ['error', {
capIsNewExceptions: [
// ERR is an async-stacktrace convention. Remove this exception after modernizing code to
// use async and await.
'ERR',
],
}],
'new-parens': 'error',
'no-array-constructor': 'error',
'no-caller': 'error',
'no-duplicate-imports': 'error',
'no-eval': 'error',
'no-extend-native': 'error',
'no-implicit-globals': 'error',
'no-implied-eval': 'error',
'no-lonely-if': 'error',
'no-multi-spaces': 'error',
'no-multi-str': 'error',
'no-multiple-empty-lines': ['error', {max: 2, maxBOF: 0, maxEOF: 0}],
'no-new-object': 'error',
'no-new-wrappers': 'error',
'no-nonoctal-decimal-escape': 'error',
'no-prototype-builtins': 'error',
'no-script-url': 'error',
'no-tabs': 'error',
'no-throw-literal': 'error',
'no-trailing-spaces': 'error',
'no-unsafe-optional-chaining': 'error',
'no-unused-vars': ['error', {args: 'none'}],
// There is a lot of existing code that intentionally declares functions below their use.
// Hopefully that code will be updated, but until then this is set to warn to keep CI tests from
// failing.
'no-use-before-define': 'warn',
'no-var': 'error',
'no-whitespace-before-property': 'error',
'nonblock-statement-body-position': 'error',
'object-curly-newline': 'error',
'object-curly-spacing': 'error',
'object-shorthand': 'error',
'one-var': ['error', {initialized: 'never'}],
'one-var-declaration-per-line': ['error', 'initializations'],
'operator-assignment': 'error',
'operator-linebreak': 'error',
'padded-blocks': ['error', 'never'],
'prefer-arrow-callback': 'error',
'prefer-arrow/prefer-arrow-functions': 'error',
'prefer-const': 'error',
'prefer-promise-reject-errors': 'error',
'prefer-rest-params': 'error',
'prefer-spread': 'error',
'prefer-template': 'error',
// This rule is largely unnecessary thanks to the `await` keyword (`.then()` should be rare).
// Also, being forced to add a return statement for a valueless Promise is annoying.
'promise/always-return': 'off',
// This rule is largely unnecessary because most browsers now log unhandled Promise rejections.
'promise/catch-or-return': 'off',
'quote-props': ['error', 'consistent-as-needed'],
'quotes': ['error', 'single', {avoidEscape: true}],
'rest-spread-spacing': 'error',
'semi': 'error',
'semi-spacing': 'error',
'semi-style': 'error',
'space-before-blocks': 'error',
'space-before-function-paren': [
'error',
{anonymous: 'always', asyncArrow: 'always', named: 'never'},
],
'space-in-parens': 'error',
'space-infix-ops': 'error',
'space-unary-ops': ['error', {words: true, nonwords: false}],
'spaced-comment': 'error',
'strict': ['error', 'global'],
'switch-colon-spacing': 'error',
'template-curly-spacing': 'error',
'template-tag-spacing': 'error',
},
};