Rule: quotemark

Enforces quote character for string literals.

Notes

• Has Fix

Config

Five arguments may be optionally provided:

• "single" enforces single quotes.
• "double" enforces double quotes.
• "backtick" enforces backticks.
• "jsx-single" enforces single quotes for JSX attributes.
• "jsx-double" enforces double quotes for JSX attributes.
• "avoid-template" forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if "avoid-escape" is enabled and both single and double quotes are present in the string (the latter option takes precedence).
• "avoid-escape" allows you to use the "other" quotemark in cases where escaping would normally be required. For example, [true, "double", "avoid-escape"] would not report a failure on the string literal 'Hello "World"'.

Examples

"quotemark": true,single,avoid-escape,avoid-template

"quotemark": true,single,jsx-double

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "single",
      "double",
      "backtick",
      "jsx-single",
      "jsx-double",
      "avoid-escape",
      "avoid-template"
    ]
  },
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: whitespace

Enforces whitespace style conventions.

Rationale

Helps maintain a readable, consistent style in your codebase.

Notes

• Has Fix

Config

Several arguments may be optionally provided:

• "check-branch" checks branching statements (if/else/for/while) are followed by whitespace.
• "check-decl"checks that variable declarations have whitespace around the equals token.
• "check-operator" checks for whitespace around operator tokens.
• "check-module" checks for whitespace in import & export statements.
• "check-separator" checks for whitespace after separator tokens (,/;).
• "check-rest-spread" checks that there is no whitespace after rest/spread operator (...).
• "check-type" checks for whitespace before a variable type specification.
• "check-typecast" checks for whitespace between a typecast and its target.
• "check-type-operator" checks for whitespace between type operators | and &.
• "check-preblock" checks for whitespace before the opening brace of a block.
• "check-postbrace" checks for whitespace after an opening brace.

Examples

"whitespace": true,check-branch,check-operator,check-typecast

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "check-branch",
      "check-decl",
      "check-operator",
      "check-module",
      "check-separator",
      "check-rest-spread",
      "check-type",
      "check-typecast",
      "check-type-operator",
      "check-preblock",
      "check-postbrace"
    ]
  },
  "minLength": 0,
  "maxLength": 11
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: no-trailing-whitespace

Disallows trailing whitespace at the end of a line.

Rationale

Keeps version control diffs clean as it prevents accidental whitespace from being committed.

Notes

• Has Fix

Config

Possible settings are:

• "ignore-template-strings": Allows trailing whitespace in template strings.
• "ignore-comments": Allows trailing whitespace in comments.
• "ignore-jsdoc": Allows trailing whitespace only in JSDoc comments.
• "ignore-blank-lines": Allows trailing whitespace on empty lines.

Examples

"no-trailing-whitespace": true

"no-trailing-whitespace": true,ignore-comments

"no-trailing-whitespace": true,ignore-jsdoc

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "ignore-comments",
      "ignore-jsdoc",
      "ignore-template-strings",
      "ignore-blank-lines"
    ]
  }
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: prefer-const

Requires that variable declarations use const instead of let and var if possible.

If a variable is only assigned to once when it is declared, it should be declared using 'const'

Notes

• Has Fix

Config

An optional object containing the property "destructuring" with two possible values:

• "any" (default) - If any variable in destructuring can be const, this rule warns for those variables.
• "all" - Only warns if all variables in destructuring can be const.

Examples

"prefer-const": true

"prefer-const": true,[object Object]

Schema

{
  "type": "object",
  "properties": {
    "destructuring": {
      "type": "string",
      "enum": [
        "all",
        "any"
      ]
    }
  }
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: quotemark

Enforces quote character for string literals.

Notes

• Has Fix

Config

Five arguments may be optionally provided:

• "single" enforces single quotes.
• "double" enforces double quotes.
• "backtick" enforces backticks.
• "jsx-single" enforces single quotes for JSX attributes.
• "jsx-double" enforces double quotes for JSX attributes.
• "avoid-template" forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if "avoid-escape" is enabled and both single and double quotes are present in the string (the latter option takes precedence).
• "avoid-escape" allows you to use the "other" quotemark in cases where escaping would normally be required. For example, [true, "double", "avoid-escape"] would not report a failure on the string literal 'Hello "World"'.

Examples

"quotemark": true,single,avoid-escape,avoid-template

"quotemark": true,single,jsx-double

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "single",
      "double",
      "backtick",
      "jsx-single",
      "jsx-double",
      "avoid-escape",
      "avoid-template"
    ]
  },
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: quotemark

Enforces quote character for string literals.

Notes

• Has Fix

Config

Five arguments may be optionally provided:

• "single" enforces single quotes.
• "double" enforces double quotes.
• "backtick" enforces backticks.
• "jsx-single" enforces single quotes for JSX attributes.
• "jsx-double" enforces double quotes for JSX attributes.
• "avoid-template" forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if "avoid-escape" is enabled and both single and double quotes are present in the string (the latter option takes precedence).
• "avoid-escape" allows you to use the "other" quotemark in cases where escaping would normally be required. For example, [true, "double", "avoid-escape"] would not report a failure on the string literal 'Hello "World"'.

Examples

"quotemark": true,single,avoid-escape,avoid-template

"quotemark": true,single,jsx-double

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "single",
      "double",
      "backtick",
      "jsx-single",
      "jsx-double",
      "avoid-escape",
      "avoid-template"
    ]
  },
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: quotemark

Enforces quote character for string literals.

Notes

• Has Fix

Config

Five arguments may be optionally provided:

• "single" enforces single quotes.
• "double" enforces double quotes.
• "backtick" enforces backticks.
• "jsx-single" enforces single quotes for JSX attributes.
• "jsx-double" enforces double quotes for JSX attributes.
• "avoid-template" forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if "avoid-escape" is enabled and both single and double quotes are present in the string (the latter option takes precedence).
• "avoid-escape" allows you to use the "other" quotemark in cases where escaping would normally be required. For example, [true, "double", "avoid-escape"] would not report a failure on the string literal 'Hello "World"'.

Examples

"quotemark": true,single,avoid-escape,avoid-template

"quotemark": true,single,jsx-double

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "single",
      "double",
      "backtick",
      "jsx-single",
      "jsx-double",
      "avoid-escape",
      "avoid-template"
    ]
  },
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: whitespace

Enforces whitespace style conventions.

Rationale

Helps maintain a readable, consistent style in your codebase.

Notes

• Has Fix

Config

Several arguments may be optionally provided:

• "check-branch" checks branching statements (if/else/for/while) are followed by whitespace.
• "check-decl"checks that variable declarations have whitespace around the equals token.
• "check-operator" checks for whitespace around operator tokens.
• "check-module" checks for whitespace in import & export statements.
• "check-separator" checks for whitespace after separator tokens (,/;).
• "check-rest-spread" checks that there is no whitespace after rest/spread operator (...).
• "check-type" checks for whitespace before a variable type specification.
• "check-typecast" checks for whitespace between a typecast and its target.
• "check-type-operator" checks for whitespace between type operators | and &.
• "check-preblock" checks for whitespace before the opening brace of a block.
• "check-postbrace" checks for whitespace after an opening brace.

Examples

"whitespace": true,check-branch,check-operator,check-typecast

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "check-branch",
      "check-decl",
      "check-operator",
      "check-module",
      "check-separator",
      "check-rest-spread",
      "check-type",
      "check-typecast",
      "check-type-operator",
      "check-preblock",
      "check-postbrace"
    ]
  },
  "minLength": 0,
  "maxLength": 11
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: quotemark

Enforces quote character for string literals.

Notes

• Has Fix

Config

Five arguments may be optionally provided:

• "single" enforces single quotes.
• "double" enforces double quotes.
• "backtick" enforces backticks.
• "jsx-single" enforces single quotes for JSX attributes.
• "jsx-double" enforces double quotes for JSX attributes.
• "avoid-template" forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if "avoid-escape" is enabled and both single and double quotes are present in the string (the latter option takes precedence).
• "avoid-escape" allows you to use the "other" quotemark in cases where escaping would normally be required. For example, [true, "double", "avoid-escape"] would not report a failure on the string literal 'Hello "World"'.

Examples

"quotemark": true,single,avoid-escape,avoid-template

"quotemark": true,single,jsx-double

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "single",
      "double",
      "backtick",
      "jsx-single",
      "jsx-double",
      "avoid-escape",
      "avoid-template"
    ]
  },
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: semicolon

Enforces consistent semicolon usage at the end of every statement.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• "always" enforces semicolons at the end of every statement.
• "never" disallows semicolons at the end of every statement except for when they are necessary.

The following arguments may be optionally provided:

• "ignore-interfaces" skips checking semicolons at the end of interface members.
• "ignore-bound-class-methods" skips checking semicolons at the end of bound class methods.
• "strict-bound-class-methods" disables any special handling of bound class methods and treats them as any other assignment. This option overrides "ignore-bound-class-methods".

Examples

"semicolon": true,always

"semicolon": true,never

"semicolon": true,always,ignore-interfaces

"semicolon": true,always,ignore-bound-class-methods

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "always",
        "never"
      ]
    },
    {
      "type": "string",
      "enum": [
        "ignore-interfaces"
      ]
    }
  ],
  "additionalItems": false
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: one-line

Requires the specified tokens to be on the same line as the expression preceding them.

Notes

• Has Fix

Config

Five arguments may be optionally provided:

• "check-catch" checks that catch is on the same line as the closing brace for try.
• "check-finally" checks that finally is on the same line as the closing brace for catch.
• "check-else" checks that else is on the same line as the closing brace for if.
• "check-open-brace" checks that an open brace falls on the same line as its preceding expression.
• "check-whitespace" checks preceding whitespace for the specified tokens.

Examples

"one-line": true,check-catch,check-finally,check-else

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "check-catch",
      "check-finally",
      "check-else",
      "check-open-brace",
      "check-whitespace"
    ]
  },
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: quotemark

Enforces quote character for string literals.

Notes

• Has Fix

Config

Five arguments may be optionally provided:

• "single" enforces single quotes.
• "double" enforces double quotes.
• "backtick" enforces backticks.
• "jsx-single" enforces single quotes for JSX attributes.
• "jsx-double" enforces double quotes for JSX attributes.
• "avoid-template" forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if "avoid-escape" is enabled and both single and double quotes are present in the string (the latter option takes precedence).
• "avoid-escape" allows you to use the "other" quotemark in cases where escaping would normally be required. For example, [true, "double", "avoid-escape"] would not report a failure on the string literal 'Hello "World"'.

Examples

"quotemark": true,single,avoid-escape,avoid-template

"quotemark": true,single,jsx-double

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "single",
      "double",
      "backtick",
      "jsx-single",
      "jsx-double",
      "avoid-escape",
      "avoid-template"
    ]
  },
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: whitespace

Enforces whitespace style conventions.

Rationale

Helps maintain a readable, consistent style in your codebase.

Notes

• Has Fix

Config

Several arguments may be optionally provided:

• "check-branch" checks branching statements (if/else/for/while) are followed by whitespace.
• "check-decl"checks that variable declarations have whitespace around the equals token.
• "check-operator" checks for whitespace around operator tokens.
• "check-module" checks for whitespace in import & export statements.
• "check-separator" checks for whitespace after separator tokens (,/;).
• "check-rest-spread" checks that there is no whitespace after rest/spread operator (...).
• "check-type" checks for whitespace before a variable type specification.
• "check-typecast" checks for whitespace between a typecast and its target.
• "check-type-operator" checks for whitespace between type operators | and &.
• "check-preblock" checks for whitespace before the opening brace of a block.
• "check-postbrace" checks for whitespace after an opening brace.

Examples

"whitespace": true,check-branch,check-operator,check-typecast

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "check-branch",
      "check-decl",
      "check-operator",
      "check-module",
      "check-separator",
      "check-rest-spread",
      "check-type",
      "check-typecast",
      "check-type-operator",
      "check-preblock",
      "check-postbrace"
    ]
  },
  "minLength": 0,
  "maxLength": 11
}

For more information see this page.

Rule: no-var-keyword

Disallows usage of the var keyword.

Use let or const instead.

Rationale

Declaring variables using var has several edge case behaviors that make var unsuitable for modern code. Variables declared by var have their parent function block as their scope, ignoring other control flow statements. vars have declaration "hoisting" (similar to functions) and can appear to be used before declaration.

Variables declared by const and let instead have as their scope the block in which they are defined, and are not allowed to used before declaration or be re-declared with another const or let.

Notes

• Has Fix

Config

Not configurable.

Examples

"no-var-keyword": true

For more information see this page.

Rule: whitespace

Enforces whitespace style conventions.

Rationale

Helps maintain a readable, consistent style in your codebase.

Notes

• Has Fix

Config

Several arguments may be optionally provided:

• "check-branch" checks branching statements (if/else/for/while) are followed by whitespace.
• "check-decl"checks that variable declarations have whitespace around the equals token.
• "check-operator" checks for whitespace around operator tokens.
• "check-module" checks for whitespace in import & export statements.
• "check-separator" checks for whitespace after separator tokens (,/;).
• "check-rest-spread" checks that there is no whitespace after rest/spread operator (...).
• "check-type" checks for whitespace before a variable type specification.
• "check-typecast" checks for whitespace between a typecast and its target.
• "check-type-operator" checks for whitespace between type operators | and &.
• "check-preblock" checks for whitespace before the opening brace of a block.
• "check-postbrace" checks for whitespace after an opening brace.

Examples

"whitespace": true,check-branch,check-operator,check-typecast

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "check-branch",
      "check-decl",
      "check-operator",
      "check-module",
      "check-separator",
      "check-rest-spread",
      "check-type",
      "check-typecast",
      "check-type-operator",
      "check-preblock",
      "check-postbrace"
    ]
  },
  "minLength": 0,
  "maxLength": 11
}

For more information see this page.

Rule: whitespace

Enforces whitespace style conventions.

Rationale

Helps maintain a readable, consistent style in your codebase.

Notes

• Has Fix

Config

Several arguments may be optionally provided:

• "check-branch" checks branching statements (if/else/for/while) are followed by whitespace.
• "check-decl"checks that variable declarations have whitespace around the equals token.
• "check-operator" checks for whitespace around operator tokens.
• "check-module" checks for whitespace in import & export statements.
• "check-separator" checks for whitespace after separator tokens (,/;).
• "check-rest-spread" checks that there is no whitespace after rest/spread operator (...).
• "check-type" checks for whitespace before a variable type specification.
• "check-typecast" checks for whitespace between a typecast and its target.
• "check-type-operator" checks for whitespace between type operators | and &.
• "check-preblock" checks for whitespace before the opening brace of a block.
• "check-postbrace" checks for whitespace after an opening brace.

Examples

"whitespace": true,check-branch,check-operator,check-typecast

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "check-branch",
      "check-decl",
      "check-operator",
      "check-module",
      "check-separator",
      "check-rest-spread",
      "check-type",
      "check-typecast",
      "check-type-operator",
      "check-preblock",
      "check-postbrace"
    ]
  },
  "minLength": 0,
  "maxLength": 11
}

For more information see this page.

Rule: quotemark

Enforces quote character for string literals.

Notes

• Has Fix

Config

Five arguments may be optionally provided:

• "single" enforces single quotes.
• "double" enforces double quotes.
• "backtick" enforces backticks.
• "jsx-single" enforces single quotes for JSX attributes.
• "jsx-double" enforces double quotes for JSX attributes.
• "avoid-template" forbids single-line untagged template strings that do not contain string interpolations. Note that backticks may still be used if "avoid-escape" is enabled and both single and double quotes are present in the string (the latter option takes precedence).
• "avoid-escape" allows you to use the "other" quotemark in cases where escaping would normally be required. For example, [true, "double", "avoid-escape"] would not report a failure on the string literal 'Hello "World"'.

Examples

"quotemark": true,single,avoid-escape,avoid-template

"quotemark": true,single,jsx-double

Schema

{
  "type": "array",
  "items": {
    "type": "string",
    "enum": [
      "single",
      "double",
      "backtick",
      "jsx-single",
      "jsx-double",
      "avoid-escape",
      "avoid-template"
    ]
  },
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.

Rule: indent

Enforces indentation with tabs or spaces.

Rationale

Using only one of tabs or spaces for indentation leads to more consistent editor behavior, cleaner diffs in version control, and easier programmatic manipulation.

Notes

• Has Fix

Config

One of the following arguments must be provided:

• spaces enforces consistent spaces.
• tabs enforces consistent tabs.

A second optional argument specifies indentation size:

• 2 enforces 2 space indentation.
• 4 enforces 4 space indentation.

Indentation size is required for auto-fixing, but not for rule checking.

NOTE: auto-fixing will only convert invalid indent whitespace to the desired type, it will not fix invalid whitespace sizes.

Examples

"indent": true,spaces

"indent": true,spaces,4

"indent": true,tabs,2

Schema

{
  "type": "array",
  "items": [
    {
      "type": "string",
      "enum": [
        "tabs",
        "spaces"
      ]
    },
    {
      "type": "number",
      "enum": [
        2,
        4
      ]
    }
  ],
  "minLength": 0,
  "maxLength": 5
}

For more information see this page.