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consistent-indexed-object-style

Require or disallow 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>;