sort-imports.md

规则名	规则类型	关联规则
sort-imports	suggestion	sort-keys sort-vars

The import statement is used to import members (functions, objects or primitives) that have been exported from an external module. Using a specific member syntax:

// single - Import single member.
import myMember from "my-module.js";
import {myOtherMember} from "my-other-module.js";

// multiple - Import multiple members.
import {foo, bar} from "my-module.js";

// all - Import all members, where myModule contains all the exported bindings.
import * as myModule from "my-module.js";

The import statement can also import a module without exported bindings. Used when the module does not export anything, but runs it own code or changes the global context object.

// none - Import module without exported bindings.
import "my-module.js"

When declaring multiple imports, a sorted list of import declarations make it easier for developers to read the code and find necessary imports later. This rule is purely a matter of style.

规则详解

This rule checks all import declarations and verifies that all imports are first sorted by the used member syntax and then alphabetically by the first member or alias name.

The --fix option on the command line automatically fixes some problems reported by this rule: multiple members on a single line are automatically sorted (e.g. import { b, a } from 'foo.js' is corrected to import { a, b } from 'foo.js'), but multiple lines are not reordered.

配置项

This rule accepts an object with its properties as

• ignoreCase (default: false)
• ignoreDeclarationSort (default: false)
• ignoreMemberSort (default: false)
• memberSyntaxSortOrder (default: ["none", "all", "multiple", "single"]); all 4 items must be present in the array, but you can change the order:
  • none = import module without exported bindings.
  • all = import all members provided by exported bindings.
  • multiple = import multiple members.
  • single = import single member.
• allowSeparatedGroups (default: false)

Default option settings are:

{
    "sort-imports": ["error", {
        "ignoreCase": false,
        "ignoreDeclarationSort": false,
        "ignoreMemberSort": false,
        "memberSyntaxSortOrder": ["none", "all", "multiple", "single"],
        "allowSeparatedGroups": false
    }]
}

Examples

Default settings

Examples of correct code for this rule when using default options:

::: correct

/*eslint sort-imports: "error"*/
import 'module-without-export.js';
import * as bar from 'bar.js';
import * as foo from 'foo.js';
import {alpha, beta} from 'alpha.js';
import {delta, gamma} from 'delta.js';
import a from 'baz.js';
import {b} from 'qux.js';

/*eslint sort-imports: "error"*/
import a from 'foo.js';
import b from 'bar.js';
import c from 'baz.js';

/*eslint sort-imports: "error"*/
import 'foo.js'
import * as bar from 'bar.js';
import {a, b} from 'baz.js';
import c from 'qux.js';
import {d} from 'quux.js';

/*eslint sort-imports: "error"*/
import {a, b, c} from 'foo.js'

Examples of incorrect code for this rule when using default options:

/*eslint sort-imports: "error"*/
import b from 'foo.js';
import a from 'bar.js';

/*eslint sort-imports: "error"*/
import a from 'foo.js';
import A from 'bar.js';

/*eslint sort-imports: "error"*/
import {b, c} from 'foo.js';
import {a, b} from 'bar.js';

/*eslint sort-imports: "error"*/
import a from 'foo.js';
import {b, c} from 'bar.js';

/*eslint sort-imports: "error"*/
import {a} from 'foo.js';
import {b, c} from 'bar.js';

/*eslint sort-imports: "error"*/
import a from 'foo.js';
import * as b from 'bar.js';

/*eslint sort-imports: "error"*/
import {b, a, c} from 'foo.js'

ignoreCase

When true the rule ignores the case-sensitivity of the imports local name.

选项 { "ignoreCase": true } 的 错误 代码示例：

/*eslint sort-imports: ["error", { "ignoreCase": true }]*/

import B from 'foo.js';
import a from 'bar.js';

选项 { "ignoreCase": true } 的 正确 代码示例：

::: correct

/*eslint sort-imports: ["error", { "ignoreCase": true }]*/

import a from 'foo.js';
import B from 'bar.js';
import c from 'baz.js';

Default is false.

ignoreDeclarationSort

Ignores the sorting of import declaration statements.

选项 { "ignoreDeclarationSort": false } 默认值的 错误 代码示例：

/*eslint sort-imports: ["error", { "ignoreDeclarationSort": false }]*/
import b from 'foo.js'
import a from 'bar.js'

选项 { "ignoreDeclarationSort": true } 的 正确 代码示例：

::: correct

/*eslint sort-imports: ["error", { "ignoreDeclarationSort": true }]*/
import a from 'foo.js'
import b from 'bar.js'

::: correct

/*eslint sort-imports: ["error", { "ignoreDeclarationSort": true }]*/
import b from 'foo.js'
import a from 'bar.js'

Default is false.

ignoreMemberSort

Ignores the member sorting within a multiple member import declaration.

选项 { "ignoreMemberSort": false } 默认值的 错误 代码示例：

/*eslint sort-imports: ["error", { "ignoreMemberSort": false }]*/
import {b, a, c} from 'foo.js'

选项 { "ignoreMemberSort": true } 的 正确 代码示例：

::: correct

/*eslint sort-imports: ["error", { "ignoreMemberSort": true }]*/
import {b, a, c} from 'foo.js'

Default is false.

memberSyntaxSortOrder

There are four different styles and the default member syntax sort order is:

• none - import module without exported bindings.
• all - import all members provided by exported bindings.
• multiple - import multiple members.
• single - import single member.

All four options must be specified in the array, but you can customize their order.

选项 { "memberSyntaxSortOrder": ["none", "all", "multiple", "single"] } 默认值的 错误 代码示例：

/*eslint sort-imports: "error"*/
import a from 'foo.js';
import * as b from 'bar.js';

选项 { "memberSyntaxSortOrder": ['single', 'all', 'multiple', 'none'] } 的 正确 代码示例：

::: correct

/*eslint sort-imports: ["error", { "memberSyntaxSortOrder": ['single', 'all', 'multiple', 'none'] }]*/

import a from 'foo.js';
import * as b from 'bar.js';

选项 { "memberSyntaxSortOrder": ['all', 'single', 'multiple', 'none'] } 的 正确 代码示例：

::: correct

/*eslint sort-imports: ["error", { "memberSyntaxSortOrder": ['all', 'single', 'multiple', 'none'] }]*/

import * as foo from 'foo.js';
import z from 'zoo.js';
import {a, b} from 'foo.js';

Default is ["none", "all", "multiple", "single"].

allowSeparatedGroups

When true the rule checks the sorting of import declaration statements only for those that appear on consecutive lines.

In other words, a blank line or a comment line or line with any other statement after an import declaration statement will reset the sorting of import declaration statements.

选项 { "allowSeparatedGroups": true } 的 错误 代码示例：

/*eslint sort-imports: ["error", { "allowSeparatedGroups": true }]*/

import b from 'foo.js';
import c from 'bar.js';
import a from 'baz.js';

选项 { "allowSeparatedGroups": true } 的 正确 代码示例：

::: correct

/*eslint sort-imports: ["error", { "allowSeparatedGroups": true }]*/

import b from 'foo.js';
import c from 'bar.js';

import a from 'baz.js';

::: correct

/*eslint sort-imports: ["error", { "allowSeparatedGroups": true }]*/

import b from 'foo.js';
import c from 'bar.js';
// comment
import a from 'baz.js';

::: correct

/*eslint sort-imports: ["error", { "allowSeparatedGroups": true }]*/

import b from 'foo.js';
import c from 'bar.js';
quux();
import a from 'baz.js';

Default is false.

禁用建议

This rule is a formatting preference and not following it won't negatively affect the quality of your code. If alphabetizing imports isn't a part of your coding standards, then you can leave this rule disabled.