typescript/no-empty-interface Style
What it does
Disallow the declaration of empty interfaces.
Why is this bad?
An empty interface in TypeScript does very little: any non-nullable value is assignable to {}. Using an empty interface is often a sign of programmer error, such as misunderstanding the concept of {} or forgetting to fill in fields. This rule aims to ensure that only meaningful interfaces are declared in the code.
Examples
Examples of incorrect code for this rule:
ts
interface Foo {}
interface Bar extends Foo {}Examples of correct code for this rule:
ts
interface Foo {
member: string;
}
interface Bar extends Foo {
member: string;
}Configuration
This rule accepts a configuration object with the following properties:
allowSingleExtends
type: boolean
default: false
When set to true, allows empty interfaces that extend a single interface.
How to use
To enable this rule using the config file or in the CLI, you can use:
json
{
"rules": {
"typescript/no-empty-interface": "error"
}
}bash
oxlint --deny typescript/no-empty-interface