noUnusedImports

诊断类别：lint/correctness/noUnusedImports

¥Diagnostic Category: lint/correctness/noUnusedImports

JavaScript (and super languages)

自从：v1.3.0

¥Since: v1.3.0

来源：

¥Sources:

与以下相同：unused-imports/no-unused-imports

¥Same as: unused-imports/no-unused-imports

禁止未使用的导入。

¥Disallow unused imports.

未使用的导入可能是重构不完整造成的。代码修复可以删除与 import 相关的注释。参见最后一个无效示例。

¥Unused imports might be the result of an incomplete refactoring. The code fix can remove comments associated with an import. See the last invalid example.

请注意，未使用的导入前面的琐碎内容（例如注释或换行符）也将被删除。这样像 @ts-expect-error 这样的注释指令就不会被转移到错误的地方。

¥Note that the leading trivia, e.g., comments or newlines preceding the unused imports will also be removed. So that comment directives like @ts-expect-error won’t be transferred to a wrong place.

选项

¥Options

此规则尊重 jsxRuntime 设置，如果设置为 "reactClassic"，则会对 React 全局变量进行例外处理。

¥This rule respects the jsxRuntime setting and will make an exception for React globals if it is set to "reactClassic".

示例

¥Examples

无效

¥Invalid

import A from 'mod';

code-block.js:1:8 lint/correctness/noUnusedImports  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ This import is unused.
  
  > 1 │ import A from ‘mod’;
      │        ^
    2 │ 
  
  ℹ Unused imports might be the result of an incomplete refactoring.
  
  ℹ Safe fix: Remove the unused import.
  
    1 │ import·A·from·‘mod’;
      │ --------------------

import * as A from 'mod';

code-block.js:1:13 lint/correctness/noUnusedImports  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ This import is unused.
  
  > 1 │ import * as A from ‘mod’;
      │             ^
    2 │ 
  
  ℹ Unused imports might be the result of an incomplete refactoring.
  
  ℹ Safe fix: Remove the unused import.
  
    1 │ import·*·as·A·from·‘mod’;
      │ -------------------------

import { type A, B } from 'mod';

export { B }

code-block.ts:1:15 lint/correctness/noUnusedImports  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ This import is unused.
  
  > 1 │ import { type A, B } from ‘mod’;
      │               ^
    2 │ 
    3 │ export { B }
  
  ℹ Unused imports might be the result of an incomplete refactoring.
  
  ℹ Safe fix: Remove the unused import.
  
    1 │ import·{·type·A,·B·}·from·‘mod’;
      │          --------

// Header comment
import /*inner comment */ A from 'mod'; // Associated comment

// Another header comment
import {
    // A's header comment
    type A, // A's comment
    // B's header comment
    B,
} from 'mod';

export { B }

code-block.js:7:5 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ ‘import { type x ident }’ are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.
  
    5 │ import {
    6 │     // A’s header comment
  > 7 │     type A, // A’s comment
      │     ^^^^^^
    8 │     // B’s header comment
    9 │     B,
  
  ℹ TypeScript only syntax

有效

¥Valid

import { A, type B } from 'mod';

function f(arg: B): A {
    return new A(arg);
}

noUnusedImports

选项

示例

无效

有效

相关链接