puppeteer/.eslintrc.js

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module.exports = {
root: true,
env: {
node: true,
es6: true,
},
parser: '@typescript-eslint/parser',
plugins: ['mocha', '@typescript-eslint', 'import'],
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extends: ['plugin:prettier/recommended'],
rules: {
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// Brackets keep code readable.
curly: ['error', 'all'],
// Brackets keep code readable and `return` intentions clear.
'arrow-body-style': ['error', 'always'],
// Error if files are not formatted with Prettier correctly.
'prettier/prettier': 'error',
// syntax preferences
'spaced-comment': [
'error',
'always',
{
markers: ['*'],
},
],
eqeqeq: ['error'],
'accessor-pairs': [
'error',
{
getWithoutSet: false,
setWithoutGet: false,
},
],
'new-parens': 'error',
'func-call-spacing': 'error',
'prefer-const': 'error',
'max-len': [
'error',
{
/* this setting doesn't impact things as we use Prettier to format
* our code and hence dictate the line length.
* Prettier aims for 80 but sometimes makes the decision to go just
* over 80 chars as it decides that's better than wrapping. ESLint's
* rule defaults to 80 but therefore conflicts with Prettier. So we
* set it to something far higher than Prettier would allow to avoid
* it causing issues and conflicting with Prettier.
*/
code: 200,
comments: 90,
ignoreTemplateLiterals: true,
ignoreUrls: true,
ignoreStrings: true,
ignoreRegExpLiterals: true,
},
],
// anti-patterns
'no-var': 'error',
'no-with': 'error',
'no-multi-str': 'error',
'no-caller': 'error',
'no-implied-eval': 'error',
'no-labels': 'error',
'no-new-object': 'error',
'no-octal-escape': 'error',
'no-self-compare': 'error',
'no-shadow-restricted-names': 'error',
'no-cond-assign': 'error',
'no-debugger': 'error',
'no-dupe-keys': 'error',
'no-duplicate-case': 'error',
'no-empty-character-class': 'error',
'no-unreachable': 'error',
'no-unsafe-negation': 'error',
radix: 'error',
'valid-typeof': 'error',
'no-unused-vars': [
'error',
{
args: 'none',
vars: 'local',
varsIgnorePattern:
'([fx]?describe|[fx]?it|beforeAll|beforeEach|afterAll|afterEach)',
},
],
'no-implicit-globals': ['error'],
// es2015 features
'require-yield': 'error',
'template-curly-spacing': ['error', 'never'],
// ensure we don't have any it.only or describe.only in prod
'mocha/no-exclusive-tests': 'error',
'no-restricted-imports': [
'error',
{
patterns: ['*Events'],
paths: [
{
name: 'mitt',
message:
'Import `mitt` from the vendored location: third_party/mitt/index.js',
},
],
},
],
'import/extensions': ['error', 'ignorePackages'],
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'import/order': [
'error',
{
'newlines-between': 'always',
alphabetize: {order: 'asc', caseInsensitive: true},
},
],
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'no-restricted-syntax': [
'error',
// Don't allow underscored declarations on camelCased variables/properties.
// ...RESTRICTED_UNDERSCORED_IDENTIFIERS,
],
},
overrides: [
{
files: ['*.ts'],
parserOptions: {
allowAutomaticSingleRunInference: true,
project: './tsconfig.base.json',
},
extends: [
'plugin:@typescript-eslint/eslint-recommended',
'plugin:@typescript-eslint/recommended',
],
plugins: ['eslint-plugin-tsdoc', 'local'],
rules: {
// Keeps comments formatted.
'local/prettier-comments': 'error',
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// Brackets keep code readable.
curly: ['error', 'all'],
// Brackets keep code readable and `return` intentions clear.
'arrow-body-style': ['error', 'always'],
// Error if comments do not adhere to `tsdoc`.
'tsdoc/syntax': 'error',
// Keeps array types simple only when they are simple for readability.
'@typescript-eslint/array-type': ['error', {default: 'array-simple'}],
'no-unused-vars': 'off',
'@typescript-eslint/no-unused-vars': [
'error',
{argsIgnorePattern: '^_'},
],
'func-call-spacing': 'off',
'@typescript-eslint/func-call-spacing': 'error',
semi: 'off',
'@typescript-eslint/semi': 'error',
'@typescript-eslint/no-empty-function': 'off',
'@typescript-eslint/no-use-before-define': 'off',
// We have to use any on some types so the warning isn't valuable.
'@typescript-eslint/no-explicit-any': 'off',
// We don't require explicit return types on basic functions or
// dummy functions in tests, for example
'@typescript-eslint/explicit-function-return-type': 'off',
// We allow non-null assertions if the value was asserted using `assert` API.
'@typescript-eslint/no-non-null-assertion': 'off',
/**
* This is the default options (as per
* https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/docs/rules/ban-types.md),
*
* Unfortunately there's no way to
*/
'@typescript-eslint/ban-types': [
'error',
{
extendDefaults: true,
types: {
/*
* Puppeteer's API accepts generic functions in many places so it's
* not a useful linting rule to ban the `Function` type. This turns off
* the banning of the `Function` type which is a default rule.
*/
Function: false,
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},
},
],
// By default this is a warning but we want it to error.
'@typescript-eslint/explicit-module-boundary-types': 'error',
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'no-restricted-syntax': [
'error',
{
// Never use `require` in TypeScript since they are transpiled out.
selector: "CallExpression[callee.name='require']",
message: '`require` statements are not allowed. Use `import`.',
},
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{
// We need this as NodeJS will run until all the timers have resolved
message: 'Use method `Deferred.race()` instead.',
selector:
'MemberExpression[object.name="Promise"][property.name="race"]',
},
{
message:
'Deferred `valueOrThrow` should not be called in `Deferred.race()` pass deferred directly',
selector:
'CallExpression[callee.object.name="Deferred"][callee.property.name="race"] > ArrayExpression > CallExpression[callee.property.name="valueOrThrow"]',
},
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],
'@typescript-eslint/no-floating-promises': [
'error',
{ignoreVoid: true, ignoreIIFE: true},
],
},
},
],
};