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complete/type-declaration-immutability

💼 This rule is enabled in the ✅ recommended config.

📝 Enforces that interfaces are immutable.

💭 This rule requires type information.

This rule has the same purpose as functional/type-declaration-immutability, but has no options and requires every interface to be fully immutable. Type aliases are not checked, and interface names do not affect enforcement.

Rule Details

Section titled “Rule Details”
// Bad
interface Foo {
  bar: string;
}


// Good
interface Foo {
  readonly bar: string;
}

Deeply immutable ReadonlyMap, ReadonlySet, and read-only array types are considered immutable.

Options

Section titled “Options”

This rule is not configurable.

Resources

Section titled “Resources”