@duckduckgo/eslint-config-duckduckgo

DuckDuckGo JavaScript Style Guide

To lint all our JavaScript we make use of ESLint. This repository contains our default linting configuration.

What follows is a high-level summary of how we've applied ESLint's rules:

Best Practices

• complexity
• consistent-return
• eqeqeq
• curly
• dot-location
• dot-notation
• no-case-declarations
• no-else-return
• no-empty-function
• no-empty-pattern
• no-eq-null
• no-eval
• no-extend-native
• no-extra-bind
• no-fallthrough
• no-floating-decimal
• no-global-assign
• no-invalid-this
• no-lone-blocks
• no-loop-func
• no-octal
• no-proto
• no-redeclare
• no-return-assign
• no-script-url
• no-self-assign
• no-self-compare
• no-sequences
• no-useless-return
• no-with
• radix
• yoda
• no-unmodified-loop-condition
• no-multi-spaces
• no-multi-str
• no-implied-eval
• no-useless-escape
• no-iterator

Possible Errors

• no-cond-assign
• no-constant-condition
• no-control-regex
• no-debugger
• no-dupe-args
• no-dupe-keys
• no-duplicate-case
• no-empty-character-class
• no-empty
• no-ex-assign
• no-extra-boolean-cast
• no-extra-parens
• no-extra-semi
• no-func-assign
• no-inner-declarations
• no-invalid-regexp
• no-irregular-whitespace
• no-obj-calls
• no-prototype-builtins
• no-regex-spaces
• no-sparse-arrays
• no-unexpected-multiline
• no-unreachable
• no-unsafe-finally
• no-unsafe-negation
• use-isnan
• valid-typeof
• no-compare-neg-zero

Stylistic Issues

• array-bracket-spacing
• block-spacing
• brace-style
• camelcase
• comma-dangle
• comma-style
• semi
• comma-spacing
• computed-property-spacing
• consistent-this
• eol-last
• func-call-spacing
• new-parens
• newline-per-chained-call
• no-array-constructor
• no-bitwise
• no-lonely-if
• spaced-comment
• space-unary-ops
• linebreak-style
• no-mixed-spaces-and-tabs
• space-before-function-paren
• space-in-parens
• space-infix-ops
• semi-spacing
• no-multiple-empty-lines
• no-new-object
• no-tabs
• no-trailing-spaces
• no-spaced-func
• operator-assignment
• one-var-declaration-per-line
• no-whitespace-before-property
• no-unneeded-ternary
• object-curly-spacing
• object-property-newline
• key-spacing
• space-before-blocks
• keyword-spacing
• max-len
• new-cap
• no-restricted-syntax
• no-plusplus
• no-nested-ternary
• padded-blocks
• no-mixed-operators
• quote-props
• max-depth
• max-params
• padding-line-between-statements
• quotes
• unicode-bom

Variables

• no-delete-var
• no-label-var
• no-shadow-restricted-names
• no-undef-init
• no-undef
• no-undefined
• no-unused-vars
• no-use-before-define