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consistent-indexed-object-style

Requires or disallows the Record type.

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>;

Attributes

  • Included in configs
    • ✅ Recommended
    • 🔒 Strict
  • Fixable
    • 🔧 Automated Fixer
    • 🛠 Suggestion Fixer
  • 💭 Requires type information

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>;