--- /dev/null
+// Copyright 2021 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+module.exports = {
+ root: true,
+ env: {
+ browser: true,
+ // This allows the runtime environment (i.e. objects).
+ es6: true,
+ },
+ parserOptions: {
+ // This sets the syntax parsing level.
+ ecmaVersion: 2020,
+ sourceType: 'module',
+ },
+
+ plugins: ['jsdoc'],
+
+ // See https://eslint.org/docs/rules/ for details.
+ // These rules were picked based on the existing codebase. If you find one
+ // to be too onerous and not required by the styleguide, feel free to discuss.
+ rules: {
+ 'array-bracket-spacing': 'error',
+ 'arrow-parens': ['error', 'always'],
+ 'arrow-spacing': ['error', {before: true, after: true}],
+ 'block-spacing': ['error', 'always'],
+ 'comma-dangle': ['error', 'always-multiline'],
+ 'comma-spacing': 'error',
+ 'comma-style': 'error',
+ 'curly': 'error',
+ 'default-param-last': 'error',
+ 'eol-last': 'error',
+ 'func-call-spacing': 'error',
+ 'generator-star-spacing': ['error', 'after'],
+ // l/I: Depending on the font, these are hard to distinguish.
+ 'id-blacklist': ['error', 'l', 'I', 'self'],
+ 'keyword-spacing': 'error',
+ 'lines-between-class-members': 'error',
+ 'max-len': ['error', {code: 80, ignoreUrls: true}],
+ 'new-parens': 'error',
+ 'no-alert': 'error',
+ 'no-case-declarations': 'error',
+ 'no-cond-assign': 'error',
+ 'no-const-assign': 'error',
+ 'no-control-regex': 'error',
+ 'no-debugger': 'error',
+ 'no-dupe-args': 'error',
+ 'no-dupe-class-members': 'error',
+ 'no-dupe-keys': 'error',
+ 'no-duplicate-case': 'error',
+ 'no-empty': 'error',
+ 'no-empty-character-class': 'error',
+ 'no-eval': 'error',
+ 'no-ex-assign': 'error',
+ // We want 'all' (nestedBinaryExpressions=false), but this breaks
+ // closure-compiler casts.
+ 'no-extra-parens': ['error', 'functions'],
+ 'no-extra-semi': 'error',
+ 'no-implied-eval': 'error',
+ 'no-invalid-regexp': 'error',
+ 'no-irregular-whitespace': 'error',
+ 'no-label-var': 'error',
+ 'no-mixed-spaces-and-tabs': 'error',
+ 'no-multi-spaces': ['error', {ignoreEOLComments: true}],
+ 'no-multiple-empty-lines': 'error',
+ 'no-new': 'error',
+ 'no-new-func': 'error',
+ 'no-new-object': 'error',
+ 'no-new-wrappers': 'error',
+ 'no-obj-calls': 'error',
+ 'no-octal': 'error',
+ 'no-octal-escape': 'error',
+ 'no-return-await': 'error',
+ 'no-script-url': 'error',
+ 'no-self-assign': 'error',
+ 'no-self-compare': 'error',
+ 'no-sequences': 'error',
+ 'no-shadow-restricted-names': 'error',
+ 'no-tabs': 'error',
+ 'no-template-curly-in-string': 'error',
+ 'no-throw-literal': 'error',
+ 'no-trailing-spaces': 'error',
+ 'no-unmodified-loop-condition': 'error',
+ 'no-unneeded-ternary': 'error',
+ 'no-unreachable': 'error',
+ 'no-useless-call': 'error',
+ 'no-useless-concat': 'error',
+ 'no-useless-escape': 'error',
+ 'no-useless-return': 'error',
+ 'no-var': 'error',
+ 'no-void': 'error',
+ // We allow TODO comments.
+ 'no-warning-comments': [
+ 'error',
+ {
+ terms: ['fix', 'fixme', 'xxx'],
+ },
+ ],
+ 'no-whitespace-before-property': 'error',
+ 'no-with': 'error',
+ 'object-curly-newline': ['error', {consistent: true}],
+ 'object-curly-spacing': 'error',
+ 'one-var-declaration-per-line': 'error',
+ 'prefer-const': 'error',
+ 'prefer-numeric-literals': 'error',
+ 'prefer-rest-params': 'error',
+ 'quote-props': ['error', 'consistent'],
+ 'quotes': [
+ 'error',
+ 'single',
+ {avoidEscape: true, allowTemplateLiterals: true},
+ ],
+ 'radix': 'error',
+ 'rest-spread-spacing': 'error',
+ 'semi': ['error', 'always'],
+ 'semi-spacing': 'error',
+ 'semi-style': ['error', 'last'],
+ 'space-before-blocks': ['error', 'always'],
+ 'space-before-function-paren': [
+ 'error',
+ {
+ anonymous: 'never',
+ named: 'never',
+ asyncArrow: 'always',
+ },
+ ],
+ 'space-in-parens': ['error', 'never'],
+ 'space-infix-ops': 'error',
+ 'space-unary-ops': 'error',
+ 'spaced-comment': ['error', 'always'],
+ 'switch-colon-spacing': ['error', {after: true, before: false}],
+ 'symbol-description': 'error',
+ 'template-curly-spacing': ['error', 'never'],
+ 'unicode-bom': ['error', 'never'],
+ 'use-isnan': 'error',
+ 'valid-typeof': 'error',
+ 'yield-star-spacing': ['error', 'after'],
+ 'yoda': 'error',
+
+ 'jsdoc/check-access': 'error',
+ 'jsdoc/check-alignment': 'error',
+ 'jsdoc/check-examples': 'error',
+ // We want hanging indentation, but this check requires none everywhere.
+ 'jsdoc/check-indentation': 'off',
+ 'jsdoc/check-param-names': 'error',
+ 'jsdoc/check-property-names': 'error',
+ // Make sure this is disabled as this rejects closure syntax.
+ 'jsdoc/check-syntax': 'off',
+ 'jsdoc/check-tag-names': 'error',
+ // This is disabled until this crash is resolved:
+ // https://github.com/gajus/eslint-plugin-jsdoc/issues/389
+ 'jsdoc/check-types': 'off',
+ // We don't use these tags in the project.
+ 'jsdoc/check-values': 'off',
+ 'jsdoc/empty-tags': 'error',
+ 'jsdoc/implements-on-classes': 'error',
+ // Can't turn on until require-description is enabled.
+ 'jsdoc/match-description': 'off',
+ 'jsdoc/newline-after-description': 'error',
+ // This is only for TypeScript which we don't care about.
+ 'jsdoc/no-types': 'off',
+ // This would be nice to turn on, but requires a lot more research.
+ // See valid-types setting below too.
+ 'jsdoc/no-undefined-types': 'off',
+ // TODO(vapier): Turn this on.
+ 'jsdoc/require-description': 'off',
+ // TODO(vapier): Turn this on.
+ 'jsdoc/require-description-complete-sentence': 'off',
+ // We don't want to require examples.
+ 'jsdoc/require-example': 'off',
+ // TODO(vapier): Turn this on.
+ 'jsdoc/require-file-overview': 'off',
+ 'jsdoc/require-hyphen-before-param-description': ['error', 'never'],
+ // TODO(vapier): Turn this on.
+ 'jsdoc/require-jsdoc': 'off',
+ 'jsdoc/require-param': 'off',
+ // TODO(vapier): Turn this on.
+ 'jsdoc/require-param-description': 'off',
+ 'jsdoc/require-param-name': 'error',
+ 'jsdoc/require-param-type': 'error',
+ 'jsdoc/require-returns': 'off',
+ 'jsdoc/require-returns-check': 'error',
+ // TODO(vapier): Turn this on.
+ 'jsdoc/require-returns-description': 'off',
+ 'jsdoc/require-returns-type': 'error',
+ // This would be nice to turn on, but requires a lot more research.
+ 'jsdoc/valid-types': 'off',
+ },
+
+ settings: {
+ // https://github.com/BenoitZugmeyer/eslint-plugin-html#settings
+ html: {
+ // TODO(vapier): Would like to use .html.in, but doesn't work right.
+ // https://github.com/BenoitZugmeyer/eslint-plugin-html/issues/127
+ 'html-extensions': ['.html', '.in'],
+ },
+
+ // https://github.com/gajus/eslint-plugin-jsdoc#eslint-plugin-jsdoc
+ jsdoc: {
+ mode: 'closure',
+ preferredTypes: {
+ object: 'Object',
+ },
+ tagNamePreference: {
+ // While not explicitly defined, Google/Chromium JS style guides only
+ // use these keyword forms, as does the closure compiler docs.
+ augments: 'extends',
+ constant: 'const',
+ class: 'constructor',
+ file: 'fileoverview',
+ returns: 'return',
+ yields: 'yield',
+
+ // Stub out closure-specific tags so they get ignored.
+ // TODO(vapier): Delete this after upgrade to newer jsdoc.
+ closurePrimitive: '',
+ },
+ },
+ },
+};