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Enforce or disallow the use of the record type (consistent-indexed-object-style)

TypeScript supports defining object show keys can be flexible using an index signature. TypeScript also has a builtin type named Record to create an empty object defining only an index signature. For example, the following types are equal:

interface Foo {
[key: string]: unknown;
}

type Foo = {
[key: string]: unknown;
};

type Foo = Record<string, unknown>;

Options

  • "record": Set to "record" to only allow the Record type. Set to "index-signature" to only allow index signatures. (Defaults to "record")

For example:

{
"@typescript-eslint/consistent-indexed-object-style": [
"error",
"index-signature"
]
}

Rule details

This rule enforces a consistent way to define records.

record

Examples of code with record option.

interface Foo {
[key: string]: unknown;
}

type Foo = {
[key: string]: unknown;
};

index-signature

Examples of code with index-signature option.

type Foo = Record<string, unknown>;

Attributes

  • โœ… Recommended
  • ๐Ÿ”ง Fixable
  • ๐Ÿ’ญ Requires type information