@typescript-eslint/ban-ts-comment
Best practice
Error
Detect any '@ts-<directive>' comment as it can reduce the effectiveness of TypeScript overall.
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JavaScript rules
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@typescript-eslint/ban-types
Best practice
Error
Bans specific types and can suggest alternatives (such as String).
@typescript-eslint/explicit-function-return-type
Best practice
Error
Ensure that the values returned from functions are of the expected type
@typescript-eslint/explicit-module-boundary-types
Safety
Error
Ensure that the values returned from a module are of the expected type
@typescript-eslint/naming-convention
Code style
Error
Enforces naming conventions for everything across a codebase, in the settings verify if the naming-convention is camelCase, snake_case, etc.
@typescript-eslint/no-empty-function
Best practice
Error
Detect any empty methods, as in methods that do not have any logic
@typescript-eslint/no-unsafe-assignment
Safety
Error
Disallows assigning any to variables and properties as it creates a potential safety hole, and source of bugs in your codebase.
@typescript-eslint/no-unsafe-call
Safety
Error
Disallows calling an any type value as it creates a potential safety hole, and source of bugs in your codebase.
@typescript-eslint/no-unsafe-member-access
Safety
Error
Disallows member access on any typed variables as it creates a potential safety hole, and source of bugs in your codebase.
@typescript-eslint/no-unused-expressions
Best practice
Error
Disallow unused expressions. An unused expression which has no effect on the state of the program indicates a logic error.
@typescript-eslint/no-unused-vars
Best practice
Error
Disallow unused variables. Variables that are declared and not used anywhere in the code are most likely an error due to incomplete refactoring
@typescript-eslint/no-var-requires
Best practice
Error
Disallows the use of require statements except in import statements
@typescript-eslint/unbound-method
Safety
Error
Warns when a method is used outside of a method call.
compat/compat
Best practice
Error
This rule enables linting your code for browser compatibility.
constructor-super
Best practice
Error
Constructors of derived classes must call super()
eslint-comments/no-unused-disable
Best practice
Error
Disallow unused eslint-disable comments. Make sure all your rules are defined and are used correctly.
flowtype/no-weak-types
Safety
Error
Warns against weak type annotations any, Object and Function.
for-direction
Error prone
Error
Enforce "for" loop update clause moving the counter in the right direction.
getter-return
Error prone
Error
Enforces that a return statement is present in property getters
import/unambiguous
Security
Error
Warn if a module could be mistakenly parsed as a script by a consumer leveraging Unambiguous JavaScript Grammar to determine correct parsing goal.
jsx-a11y/click-events-have-key-events
Best practice
Error
Enforce onClick is accompanied by at least one of the following: onKeyUp, onKeyDown, onKeyPress
jsx-a11y/no-static-element-interactions
Best practice
Error
Disallow interactions in static elements. Static HTML elements do not have semantic meaning.
key-spacing
Code style
Error
Enforce consistent spacing between keys and values in object literal properties
max-statements
Best practice
Error
Check max number of statements for a function
mocha/prefer-arrow-callback
Unknown
Error
Definition for rule 'mocha/prefer-arrow-callback' was not found.
no-class-assign
Code style
Error
RegistrationForm' is a class.
no-compare-neg-zero
Error prone
Error
Detect the use of operator (e.g <=, <, ===, etc) to compare against -0.
no-const-assign
Code style
Error
Disallows assigning values to const as they're immutable.
no-control-regex
Error prone
Error
Control characters are special, invisible characters in the ASCII range 0-31. These characters are rarely used in JavaScript strings so a regular expression containing these characters is most likely a mistake.
no-dupe-class-members
Code style
Error
Disallow duplicate name in class members
no-dupe-else-if
Error prone
Error
Disallow duplicate conditions in if-else-if chains
no-dupe-keys
Error prone
Error
Disallow duplicate keys in object literals
no-duplicate-case
Error prone
Error
If a switch statement has duplicate test expressions in case clauses, it is likely that a programmer copied a case clause but forgot to change the test expression.
no-empty-pattern
Best practice
Error
Disallow empty destructuring patterns
no-func-assign
Error prone
Error
Disallow reassigning function declarations
no-global-assign
Best practice
Error
Disallow assignment to native objects or read-only global variables
no-inner-declarations
Error prone
Error
Disallow variable or function declarations in nested blocks
no-irregular-whitespace
Error prone
Error
Irregular whitespace not allowed.
no-misleading-character-class
Error prone
Error
Disallow characters which are made with multiple code points in character class syntax
no-prototype-builtins
Error prone
Error
Disallow use of Object.prototypes builtins directly
no-redeclare
Best practice
Error
Disallow variable redeclaration
no-regex-spaces
Error prone
Error
Disallow multiple spaces in regular expression literals
no-self-assign
Best practice
Error
Detects self assignments as they have no effect, so probably those are an error due to incomplete refactoring.
no-setter-return
Error prone
Error
Setter cannot return a value.
no-shadow-restricted-names
Code style
Error
Disallow shadowing of restricted names
no-unexpected-multiline
Error prone
Error
Disallow confusing multiline expressions
no-unreachable
Error prone
Error
Disallow unreachable code after return, throw, continue, and break statements
no-unsafe-finally
Error prone
Error
Disallow control flow statements in finally blocks
no-unsafe-negation
Error prone
Error
Disallow negating the left operand of relational operators
no-unused-labels
Best practice
Error
Disallow unused labels. Labels that are declared and not used anywhere in the code are most likely an error due to incomplete refactoring.
no-unused-vars
Code style
Error
Disallow unused variables. Variables that are declared and not used anywhere in the code are most likely an error due to incomplete refactoring
no-useless-catch
Best practice
Error
Disallow unnecessary catch clauses
no-useless-escape
Best practice
Error
Reports unnecessary escapes, as escaping non-special characters in strings, template literals, and regular expressions doesn't have any effect.
node/no-deprecated-api
Best practice
Error
Disallow deprecated APIs
node/no-missing-require
Error prone
Error
Disallow require() expressions which import non-existence modules
promise/catch-or-return
Safety
Error
Ensure that each time a then() is applied to a promise, a catch() is applied as well. Exceptions are made if you are returning that promise.
promise/prefer-await-to-then
Performance
Error
Use async/await style for managing concurrency instead of .then()
react-hooks/rules-of-hooks
Best practice
Error
React: Detects when rules of hooks are not being followed
react-internal/no-production-logging
Unknown
Error
React: Disallow internal logging when running in production
react-native/no-color-literals
Best practice
Error
React: Disallow color literals in styles
react-native/no-inline-styles
Unknown
Error
React: Styles should be defined in css blocks and not as inline of the web component or element
react/destructuring-assignment
Best practice
Error
React: Enforce consistent usage of destructuring assignment of props, state, and context
react/display-name
Best practice
Error
Prevent missing displayName in a React component definition
react/forbid-prop-types
Best practice
Error
React: By default this rule prevents vague prop types with more specific alternatives available (any, array, object), but any prop type can be disabled if desired.
react/jsx-key
Error prone
Error
React: Warn if an element that likely requires a key prop--namely, one present in an array literal or an arrow function expression.
react/jsx-no-duplicate-props
Error prone
Error
React: No duplicate props allowed
react/jsx-no-target-blank
Best practice
Error
React: This rules requires that you accompany target='\_blank' attributes with rel='noreferrer'.
react/jsx-no-undef
Error prone
Error
React: Detects potential ReferenceErrors resulting from misspellings or missing components.
react/no-array-index-key
Unknown
Error
React: Prevent usage of Array index in keys
react/no-children-prop
Best practice
Error
React: Prevent passing of children as props. Children should always be actual children, not passed in as a prop.
react/no-danger
Unknown
Error
React: Prevent usage of dangerous JSX properties
react/no-deprecated
Best practice
Error
React: Prevent usage of deprecated methods
react/no-direct-mutation-state
Error prone
Error
React: NEVER mutate this.state directly, as calling setState() afterwards may replace the mutation you made. Treat this.state as if it were immutable.
react/no-find-dom-node
Best practice
Error
React: Prevent usage of findDOMNode. Facebook will eventually deprecate findDOMNode as it blocks certain improvements in React in the future.
react/no-render-return-value
Best practice
Error
React: Prevent usage of the return value of ReactDOM.render
react/no-string-refs
Best practice
Error
React: Prevent using string references
react/no-unescaped-entities
Error prone
Error
React: Prevent invalid characters from appearing in markup
react/no-unknown-property
Error prone
Error
React: Prevent usage of unknown DOM property
react/prop-types
Best practice
Error
React: Prevent missing props validation in a React component definition
react/require-default-props
Best practice
Error
React: Enforce a defaultProps definition for every prop that is not a required prop
react/require-render-return
Best practice
Error
React: Enforce ES5 or ES6 class for returning value in render function
react/sort-comp
Best practice
Error
React: Enforce component methods order
react/style-prop-object
Best practice
Error
React: Enforce style prop value being an object
require-yield
Code style
Error
Disallow generator functions that do not have yield
security/detect-non-literal-regexp
Security
Error
Detects RegExp(variable), which might allow an attacker to DOS your server with a long-running regular expression.
sonarjs/no-identical-functions
Best practice
Error
When two functions have the same implementation, either it was a mistake - something else was intended - or the duplication was intentional, but may be confusing to maintainers.
standard/no-callback-literal
Best practice
Error
When invoking a callback function which uses the Node.js error-first callback pattern, all of your errors should either use the Error class or a subclass of it. It is also acceptable to use undefined or null if there is no error.
unicorn/consistent-destructuring
Best practice
Error
Use destructured variables over properties
unicorn/prefer-exponentiation-operator
Best practice
Error
Disallow the use of Math.pow in favor of the ** operator
valid-typeof
Error prone
Error
Enforce comparing typeof expressions against valid strings
vue/no-reserved-keys
Best practice
Error
Vue: Disallow overwriting reserved keys in Vue
vue/no-side-effects-in-computed-properties
Best practice
Error
Vue: Disallow side effects in computed properties
xo/throw-new-error
Best practice
Error
Use the new keyword when throwing an error