noEmptyInterface

诊断类别：lint/suspicious/noEmptyInterface

¥Diagnostic Category: lint/suspicious/noEmptyInterface

TypeScript and TSX

自从：v1.0.0

¥Since: v1.0.0

来源：

¥Sources:

灵感来自：@typescript-eslint/no-empty-interface

¥Inspired from: @typescript-eslint/no-empty-interface

禁止声明空接口。

¥Disallow the declaration of empty interfaces.

TypeScript 中的空接口功能很少：任何非空值都可以分配给 {}。使用空接口通常是程序员错误的标志，例如误解 {} 的概念或忘记填写字段。

¥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.

该规则忽略 extends 一种或多种类型的空接口。

¥The rule ignores empty interfaces that extends one or multiple types.

示例

¥Examples

无效

¥Invalid

interface A {}

code-block.ts:1:1 lint/suspicious/noEmptyInterface  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ An empty interface is equivalent to {}.
  
  > 1 │ interface A {}
      │ ^^^^^^^^^^^^^^
    2 │ 
  
  ℹ Safe fix: Use a type alias instead.
  
    1   │ - interface·A·{}
      1 │ + type·A·=·{}
    2 2 │

有效

¥Valid

interface A {
  prop: string;
}

// Allow empty interfaces that extend a type.
interface B extends A {}

// Allow empty interfaces in ambient modules
declare module "mod" {
  interface C {}
}

noEmptyInterface

示例

无效

有效

相关链接