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.eslintrc
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.eslintrc
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{
"env": {
"browser": true, // Browser global variables
"node": true, // Node.js global variables
"jquery": false, // jQuery global variables
"es6": true // ES6 global variables (ie Promise)
},
"parser": "babel-eslint", // Use babel-eslint as parser
"parserOptions": {
"sourceType": "module", // ECMAScript modules
"ecmaVersion": 6, // Set ES6 (useful for React)
"ecmaFeatures": {
"jsx": true // Enable React.js JSX
}
},
"globals": {
// Add custom globals here
"ga": true // Google Analytics
},
"plugins": [
// e.g. "react"
"react"
],
"extends": [
// Use recommended Preact linting rules
"standard",
"standard-preact"
],
"rules": {
/** Possible errors **/
"no-cond-assign": 1, // Disallow assignment in conditional expressions
"no-dupe-args": 1, // Disallow duplicate arguments in function definitions
"no-dupe-keys": 1, // Disallow duplicate keys when creating object literals
"no-duplicate-case": 1, // Disallow a duplicate case label
"no-empty": 1, // Disallow empty statements
"no-extra-semi": 1, // Disallow unnecessary semicolons
"no-func-assign": 1, // Disallow reassigning function declarations
"no-invalid-regexp": 1, // Disallow invalid regular expression strings in RegExp constructors
"no-irregular-whitespace": 1, // Disallow irregular whitespace outside of strings and comments
"no-obj-calls": 1, // Disallow calling global object properties as functions
"no-sparse-arrays": 1, // Disallow sparse arrays
"no-unexpected-multiline": 1, // Disallow confusing multiline expressions
"no-unreachable": 1, // Disallow unreachable code after return, throw, continue, and break statements
"no-tabs": "off",
"use-isnan": 1, // Require calls to isNaN() when checking for NaN
"valid-typeof": 1, // Enforce comparing typeof expressions against valid strings
/** Best practice **/
"array-callback-return": 1, // Enforce return statements in callbacks of array methods
"block-scoped-var": 1, // Enforce the use of variables within the scope they are defined
"curly": [2, "all"], // Enforce consistent brace style for all control statements
"eqeqeq": [2, "always"], // Require the use of === and !==
"no-case-declarations": 1, // Disallow lexical declarations in case clauses
"no-empty-function": 1, // Disallow empty functions
"no-eq-null": 1, // Disallow null comparisons without type-checking operators
"no-eval": 1, // Disallow the use of eval()
"no-extra-bind": 1, // Disallow unnecessary calls to .bind()
"no-fallthrough": 1, // Disallow fallthrough of case statements
"no-floating-decimal": 1, // Disallow leading or trailing decimal points in numeric literals
"no-global-assign": 1, // Disallow assignments to native objects or read-only global variables
"no-implied-eval": 1, // Disallow the use of eval()-like methods
"no-multi-spaces": 1, // Disallow multiple spaces
"no-new-func": 1, // Disallow new operators with the Function object
"no-new-wrappers": 1, // Disallow new operators with the String, Number and Boolean objects
"no-new": 1, // Disallow new operators outside of assignments or comparisons
"no-octal-escape": 1, // Disallow octal escape sequences in string literals
"no-octal": 1, // Disallow octal literals
"no-redeclare": 1, // Disallow variable redeclaration
"no-return-assign": [2, "always"], // Disallow assignment operators in return statements
"no-self-assign": [2, {"props": true}], // Disallow assignments where both sides are exactly the same
"no-self-compare": 1, // Disallow comparisons where both sides are exactly the same
"no-unused-labels": 1, // Disallow unused labels
"no-useless-concat": 1, // Disallow unnecessary concatenation of literals or template literals
"no-useless-escape": 1, // Disallow unnecessary escape characters
"no-warning-comments": [
1,
{
// Disallow specified warning terms in comments
"terms": ["todo"],
"location": "anywhere"
}
],
/** Strict Mode **/
"strict": [2, "function"], // Require or disallow strict mode directives
/** Variables **/
"no-delete-var": 1, // Disallow deleting variables
"no-label-var": 1, // Disallow labels that share a name with a variable
"no-undef-init": 1, // Disallow initializing variables to undefined
"no-undef": 1, // Disallow the use of undeclared variables unless mentioned in /*global */ comments
"no-undefined": 2, // Disallow the use of undefined as an identifier
"no-unused-vars": [
2,
{
// Disallow unused variables
"vars": "all",
"args": "after-used"
}
],
/** Stylistic Issues **/
"array-bracket-spacing": [2, "never"], // Enforce consistent spacing inside array brackets
"brace-style": [2, "1tbs"], // Enforce consistent brace style for blocks
"comma-dangle": [2, "never"], // Require or disallow trailing commas
"comma-spacing": [
2,
{
// Enforce consistent spacing before and after commas
"before": false,
"after": true
}
],
"comma-style": [2, "last"], // Enforce consistent comma style
"computed-property-spacing": [2, "never"], // Enforce consistent spacing inside computed property brackets
"eol-last": [2, "always"], // Enforce no empty lines at the end of a file
"func-call-spacing": [2, "never"], // Require or disallow spacing between function identifiers and their invocations
"indent": [2, "tab", {"SwitchCase": 1}], // Enforce consistent indentation
"padded-blocks": "off", // Disable padded blocks rule
"jsx-quotes": [2, "prefer-double"], // Enforce the consistent use of either double or single quotes in JSX attributes
"key-spacing": [
2,
{
// Enforce consistent spacing between keys and values in object literal properties
"beforeColon": false,
"afterColon": true
}
],
"keyword-spacing": [
2,
{
// Enforce consistent spacing before and after keywords
"before": true,
"after": true
}
],
"new-cap": [
2,
{
// Require constructor names to begin with a capital letter
"newIsCap": true
}
],
"new-parens": 1, // Require parentheses when invoking a constructor with no arguments
"newline-after-var": [2, "always"], // Require or disallow an empty line after variable declarations
"no-mixed-spaces-and-tabs": 1, // Disallow mixed spaces and tabs for indentation
"no-multiple-empty-lines": [
2,
{
// Disallow multiple empty lines
"max": 2,
"maxEOF": 0,
"maxBOF": 0
}
],
"no-trailing-spaces": [
2,
{
// Disallow trailing whitespace at the end of lines
"skipBlankLines": false
}
],
"no-whitespace-before-property": 1, // Disallow whitespace before properties
"one-var-declaration-per-line": [2, "always"], // Require or disallow newlines around variable declarations
"one-var": 0, // Enforce variables to be declared either together or separately in functions
"quote-props": [2, "consistent"], // Require quotes around object literal property names
"quotes": [
2,
"double",
{
// Enforce the consistent use of either backticks, double, or single quotes
"avoidEscape": true
}
],
"semi": [2, "always"], // Require or disallow semicolons instead of ASI
"sort-imports": [
// Enforce sorted import declarations within modules
2,
{
"ignoreCase": true,
"ignoreMemberSort": true
}
],
"space-before-blocks": [2, "always"], // Enforce consistent spacing before blocks
"space-before-function-paren": [2, "never"], // Enforce consistent spacing before function definition opening parenthesis
"space-in-parens": [2, "never"], // Enforce consistent spacing inside parentheses
"space-infix-ops": [
2,
{
// Require spacing around infix operators
"int32Hint": false
}
],
"spaced-comment": "off",
/** ECMAScript 6 Issues **/
"arrow-parens": [2, "always"], // Require parens in arrow function arguments
"arrow-spacing": [
2,
{
// Enforce consistent spacing before and after the arrow in arrow functions
"before": true,
"after": true
}
],
"constructor-super": 2, // Require super() calls in constructors
"generator-star-spacing": [
2,
{
// Enforce consistent spacing around * operators in generator functions
"before": false,
"after": true
}
],
"no-class-assign": 2, // Disallow reassigning class members
"no-const-assign": 2, // Disallow reassigning const variables
"no-dupe-class-members": 2, // Disallow duplicate class members
"no-duplicate-imports": 2, // Disallow duplicate module imports
"no-new-symbol": 2, // Disallow new operators with the Symbol object
"no-this-before-super": 2, // Disallow this/super before calling super() in constructors
"no-useless-computed-key": 2, // Disallow unnecessary computed property keys in object literals
"no-useless-rename": 2, // Disallow unnecessary constructors
"no-var": 2, // Require let or const instead of var
"require-yield": 2, // Require generator functions to contain yield
"rest-spread-spacing": [2, "never"], // Enforce spacing between rest and spread operators and their expressions
"template-curly-spacing": [2, "never"], // Require or disallow spacing around embedded expressions of template strings
"yield-star-spacing": [
2,
{
// Require or disallow spacing around the * in yield* expressions
"before": false,
"after": true
}
],
/** (P)react Rules **/
"react/jsx-indent": [2, "tab"],
"react/jsx-indent-props": [2, "tab"],
"react/self-closing-comp": 0
}
}