List of rules

Requires overload signatures to be adjacent to each other. Details about adjacent-overload-signatures

Disallows the use of Typescript directives without a comment. Details about ban-ts-comment

Bans the use of primitive wrapper objects (e.g. String the object is a wrapper of string the primitive) in addition to the non-explicit Function type and the misunderstood Object type. Details about ban-types

Warns the usage of unknown rule codes in ignore directives. Details about ban-unknown-rule-code

Requires deno-lint-ignore to be annotated with one or more rule names. Details about ban-untagged-ignore

Requires TODOs to be annotated with either a user tag (@user) or an issue reference (#issue). Details about ban-untagged-todo

Warns unused ignore directives. Details about ban-unused-ignore

Checks that a <button> JSX element has a valid type attribute. The default value is "submit" which is often not the desired behavior. Details about button-has-type

Enforces the use of camelCase in variable names. Details about camelcase

Verifies the correct usage of constructors and calls to super(). Details about constructor-super

Enforces default parameter(s) to be last in the function signature. Details about default-param-last

Enforces the use of type-safe equality operators === and !== instead of the more error prone == and != operators. Details about eqeqeq

Requires all functions to have explicit return types. Details about explicit-function-return-type

Requires all module exports to have fully typed declarations. Details about explicit-module-boundary-types

Requires for loop control variables to increment in the correct direction. Details about for-direction

Checks correct naming for named fresh middleware export. Details about fresh-handler-export

Disallows event handlers in fresh server components. Details about fresh-server-event-handlers

Requires all property getter functions to return a value. Details about getter-return

Require for-in loops to include an if statement. Details about guard-for-in

Enforce a consistent JSX boolean value style. Passing true as the boolean value can be omitted with the shorthand syntax. Details about jsx-boolean-value

Ensure consistent use of curly braces around JSX expressions. Details about jsx-curly-braces

Ensure the key attribute is present when passing iterables into JSX. It allows frameworks to optimize checking the order of elements. Details about jsx-key

Pass children as JSX children instead of as an attribute. Details about jsx-no-children-prop

Using JSX children together with dangerouslySetInnerHTML is invalid as they will be ignored. Details about jsx-no-danger-with-children

Disallow duplicated JSX props. Later props will always overwrite earlier props often leading to unexpected results. Details about jsx-no-duplicate-props

Fragments are only necessary at the top of a JSX "block" and only when there are multiple children. Fragments are not needed in other scenarios. Details about jsx-no-useless-fragment

Spreading the same expression twice is typically a mistake and causes unnecessary computations. Details about jsx-props-no-spread-multi

Ensure that void elements in HTML don't have any children as that is not valid HTML. See Void element article on MDN for more information. Details about jsx-void-dom-elements-no-children

Enforce conventional usage of array construction. Details about no-array-constructor

Requires that async promise executor functions are not used. Details about no-async-promise-executor

Requires await is not used in a for loop body. Details about no-await-in-loop

Disallow await keyword inside a non-async function. Details about no-await-in-sync-fn

Requires all functions called with any amount of boolean literals as parameters to use a self-documenting constant instead. Details about no-boolean-literal-for-arguments

Requires lexical declarations (let, const, function and class) in switch case or default clauses to be scoped with brackets. Details about no-case-declarations

Disallows modifying variables of class declarations. Details about no-class-assign

Disallows comparing against negative zero (-0). Details about no-compare-neg-zero

Disallows the use of the assignment operator, =, in conditional statements. Details about no-cond-assign

Disallows the use of the console global. Details about no-console

Disallows modifying a variable declared as const. Details about no-const-assign

Disallows the use of a constant expression in conditional test. Details about no-constant-condition

Disallows the use ASCII control characters in regular expressions. Details about no-control-regex

Prevent the use of dangerouslySetInnerHTML which can lead to XSS vulnerabilities if used incorrectly. Details about no-danger

Disallows the use of the debugger statement. Details about no-debugger

Disallows the deletion of variables. Details about no-delete-var

Warns the usage of the deprecated - Deno APIs. Details about no-deprecated-deno-api

Disallows using an argument name more than once in a function signature. Details about no-dupe-args

Disallows using a class member function name more than once. Details about no-dupe-class-members

Disallows using the same condition twice in an if/else if statement. Details about no-dupe-else-if

Disallows duplicate keys in object literals. Details about no-dupe-keys

Disallows using the same case clause in a switch statement more than once. Details about no-duplicate-case

Disallows the use of empty block statements. Details about no-empty

Disallows using the empty character class in a regular expression. Details about no-empty-character-class

Disallows the declaration of an empty enum. Details about no-empty-enum

Disallows the declaration of an empty interface. Details about no-empty-interface

Disallows the use of empty patterns in destructuring. Details about no-empty-pattern

Disallows the use of eval. Details about no-eval

Disallows the reassignment of exception parameters. Details about no-ex-assign

Disallows use of the any type. Details about no-explicit-any

Disallows the use of external imports. Details about no-external-imports

Disallows unnecessary boolean casts. Details about no-extra-boolean-cast

Disallows unnecessary non-null assertions. Details about no-extra-non-null-assertion

Disallows the implicit fallthrough of case statements. Details about no-fallthrough

Disallows the overwriting/reassignment of an existing function. Details about no-func-assign

Disallows assignment to native Javascript objects. Details about no-global-assign

Disallows the use of implicit exports in ["ambient" namespaces]. Details about no-implicit-declare-namespace-export

Disallows the assert keyword for import attributes. Details about no-import-assertions

Disallows reassignment of imported module bindings. Details about no-import-assign

Disallows easily inferrable types. Details about no-inferrable-types

Disallows variable or function definitions in nested blocks. Details about no-inner-declarations

Disallows specifying invalid regular expressions in RegExp constructors. Details about no-invalid-regexp

Warns the wrong usage of triple-slash reference directives. Details about no-invalid-triple-slash-reference

Disallows the use of non-space or non-tab whitespace characters. Details about no-irregular-whitespace

Disallows defining constructors for interfaces or new for classes Details about no-misused-new

Disallows the use of namespace and module keywords in TypeScript code. Details about no-namespace

Disallows the use of new operators with built-in Symbols. Details about no-new-symbol

Disallows the use of NodeJS global objects. Details about no-node-globals

Disallow non-null assertions after an optional chain expression. Details about no-non-null-asserted-optional-chain

Disallow non-null assertions using the ! postfix operator. Details about no-non-null-assertion

Disallows calling built-in global objects like functions. Details about no-obj-calls

Disallows expressing octal numbers via numeric literals beginning with 0. Details about no-octal

Disallows the use of NodeJS process global. Details about no-process-global

Disallows the use of Object.prototype builtins directly. Details about no-prototype-builtins

Disallows redeclaration of variables, functions, parameters with the same name. Details about no-redeclare

Disallows multiple spaces in regular expression literals. Details about no-regex-spaces

Disallows self assignments. Details about no-self-assign

Disallows comparisons where both sides are exactly the same. Details about no-self-compare

Disallows returning values from setters. Details about no-setter-return

Disallows shadowing of restricted names. Details about no-shadow-restricted-names

Enforces specifying explicit references to paths in module specifiers. Details about no-sloppy-imports

Enforces using types that are explicit or can be simply inferred. Details about no-slow-types

Disallows sparse arrays. Details about no-sparse-arrays

Disallow sync function inside async function. Details about no-sync-fn-in-async-fn

Disallows assigning variables to this. Details about no-this-alias

Disallows use of this or super before calling super() in constructors. Details about no-this-before-super

Disallow throwing literals as exceptions. Details about no-throw-literal

Disallows the use of top level await expressions. Details about no-top-level-await

Disallow the use of undeclared variables. Details about no-undef

Disallows the unreachable code after the control flow statements. Details about no-unreachable

Disallows the use of control flow statements within finally blocks. Details about no-unsafe-finally

Disallows the usage of negation operator ! as the left operand of relational operators. Details about no-unsafe-negation

Disallows unused labels. Details about no-unused-labels

Enforces all variables are used at least once. Details about no-unused-vars

Disallow useless rename operations where both the original and new name are exactly the same. This is often a leftover from a refactoring procedure and can be safely removed. Details about no-useless-rename

Enforces the use of block scoped variables over more error prone function scoped variables. Block scoped variables are defined using const and let keywords. Details about no-var

Disallows the use of the window object. Details about no-window

Disallows the use of Web APIs via the window object. Details about no-window-prefix

Disallows the usage of with statements. Details about no-with

Recommends using const assertion (as const) over explicitly specifying literal types or using type assertion. Details about prefer-as-const

Ensures that the code is fully written in ASCII characters. Details about prefer-ascii

Recommends declaring variables with [const] over [let]. Details about prefer-const

Recommends the use of namespace keyword over module keyword when declaring TypeScript module. Details about prefer-namespace-keyword

Suggests using frozen intrinsics from primordials rather than the default globals. Details about prefer-primordials

Disallows async functions that have no await expression or await using declaration. Details about require-await

Disallows generator functions that have no yield. Details about require-yield

Disallows multiple variable definitions in the same declaration statement. Details about single-var-declarator

Disallow certain triple slash directives in favor of ES6-style import declarations. Details about triple-slash-reference

Disallows comparisons to NaN. Details about use-isnan

Restricts the use of the typeof operator to a specific set of string literals. Details about valid-typeof

Enforces type imports to be declared as type imports. Details about verbatim-module-syntax