@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-member-accessibility
Best practice
Warning
Make code more readable and explicit about who can use which properties
@typescript-eslint/no-empty-function
Best practice
Error
Detect any empty methods, as in methods that do not have any logic
@typescript-eslint/no-non-null-assertion
Best practice
Warning
Detect all non-null assertions as they cancel the benefits of strict null-checking mode
@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/restrict-template-expressions
Best practice
Warning
Enforce template literal expressions to be of string type
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()
cypress/no-unnecessary-waiting
Best practice
Informational
Unnecessary wait for cy.request()
eslint-comments/no-unused-disable
Best practice
Error
Disallow unused eslint-disable comments. Make sure all your rules are defined and are used correctly.
import/extensions
Best practice
Informational
Ensure consistent use of file extension within the import path
import/no-commonjs
Best practice
Informational
Reports require([string]) function calls. Will not report if >1 argument, or single argument is not a literal string.
import/no-dynamic-require
Best practice
Informational
Checks every call to require() that uses expressions for the module name argument.
import/no-unresolved
Best practice
Informational
Ensures an imported module can be resolved to a module on the local filesystem, as defined by standard Node require.resolve behavior.
import/no-unused-modules
Best practice
Informational
Reports modules without any exports, individual exports not being statically imported or required from other modules in the same project or dynamic imports are supported if argument is a literal string
import/no-webpack-loader-syntax
Best practice
Informational
Forbid Webpack loader syntax in imports.
import/order
Best practice
Informational
Enforce a convention in the order of require() / import statements.
jest/expect-expect
Best practice
Warning
Jest: Ensure that there is at least one expect call made in a test.
jest/no-conditional-expect
Best practice
Warning
Jest: This rule prevents the use of expect in conditional blocks, such as ifs & catchs.
jsx-a11y/anchor-is-valid
Best practice
Informational
Make sure the HTML <a> has a valid href value and can be used to navigate in a browser, make sure all attributes are specified correctly.
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/iframe-has-title
Best practice
Warning
<iframe> elements must have a unique title property to indicate its content to the user.
jsx-a11y/label-has-associated-control
Best practice
Warning
Accessibility: Enforce that a label tag has a text label and an associated control.
jsx-a11y/label-has-for
Best practice
Informational
Accessibility: Enforce that a label tag has a text label and an associated control.
jsx-a11y/media-has-caption
Best practice
Warning
Accessibility: Provide a caption for your media. Providing captions for media is essential for deaf users to follow along.
jsx-a11y/mouse-events-have-key-events
Best practice
Warning
Accessibility: enforce onmouseover/onmouseout are accompanied by onfocus/onblur.
jsx-a11y/no-noninteractive-element-interactions
Best practice
Warning
Accessibility: disallow interactions in no interactive elements.
jsx-a11y/no-noninteractive-tabindex
Best practice
Warning
Tab key navigation should be limited to elements on the page that can be interacted with.
jsx-a11y/no-static-element-interactions
Best practice
Error
Disallow interactions in static elements. Static HTML elements do not have semantic meaning.
max-statements
Best practice
Error
Check max number of statements for a function
mocha/no-hooks-for-single-case
Best practice
Informational
Disallow hooks for a single test or test suite
mocha/no-setup-in-describe
Best practice
Informational
Disallow setup in describe blocks
no-empty-pattern
Best practice
Error
Disallow empty destructuring patterns
no-global-assign
Best practice
Error
Disallow assignment to native objects or read-only global variables
no-redeclare
Best practice
Error
Disallow variable redeclaration
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-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-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
react-hooks/rules-of-hooks
Best practice
Error
React: Detects when rules of hooks are not being followed
react-native/no-color-literals
Best practice
Error
React: Disallow color literals in styles
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-no-target-blank
Best practice
Error
React: This rules requires that you accompany target='\_blank' attributes with rel='noreferrer'.
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-deprecated
Best practice
Error
React: Prevent usage of deprecated methods
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/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
sonarjs/no-duplicate-string
Best practice
Warning
Find duplicate string
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
unicorn/prevent-abbreviations
Best practice
Informational
Using complete words results in more readable code. Not everyone knows all your abbreviations.
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