no-restricted-imports

进口是一个 ES6 / ES2015 标准，用于使您当前模块中的其他模块具有功能。在 CommonJS 中，这是通过 require（）调用实现的，这使得这个 ESLint 规则大致等同于它的 CommonJS 规则no-restricted-modules。

你为什么要限制进口？

• 某些进口在特定环境下可能没有意义。例如，Node.js 的fs模块在没有文件系统的环境中没有意义。

• 一些模块提供相似或相同的功能，思考lodash和underscore。您的项目可能已在模块上标准化。你想确保没有使用其他替代方案，因为这会不必要地膨胀项目，并且在满足时提供两个相关性的更高维护成本。

规则细节

此规则允许您指定您不希望在应用程序中使用的导入。

选项

指定受限导入的语法如下所示：

"no-restricted-imports": ["error", "import1", "import2"]

或者像这样：

"no-restricted-imports": ["error", { "paths": ["import1", "import2"] }]

在使用对象表单时，您还可以指定一个gitignore样式的数组：

"no-restricted-imports": ["error", {
    "paths": ["import1", "import2"],
    "patterns": ["import1/private/*", "import2/*", "!import2/good"]
}]

您还可以为要限制的任何路径指定自定义消息，如下所示：

"no-restricted-imports": ["error", [{
  "name": "import-foo",
  "message": "Please use import-bar instead."
}]]

或者像这样：

"no-restricted-imports": ["error", {
  "paths": [{
    "name": "import-foo",
    "message": "Please use import-bar instead."
  }]
}]

或者像这样，如果你只需要限制某个模块的某些输入：

"no-restricted-imports": ["error", {
  "paths": [{
    "name": "import-foo",
    "importNames": ["Bar"],
    "message": "Please use Bar from /import-bar/baz/ instead."
  }]
}]

自定义消息将被附加到默认错误消息。请注意，您可能不会为受限模式指定自定义错误消息，因为特定导入可能会匹配多个模式。

限制使用所有 Node.js 核心导入（通过https://github.com/nodejs/node/tree/master/lib）：

"no-restricted-imports": ["error",
         "assert","buffer","child_process","cluster","crypto","dgram","dns","domain","events","freelist","fs","http","https","module","net","os","path","punycode","querystring","readline","repl","smalloc","stream","string_decoder","sys","timers","tls","tracing","tty","url","util","vm","zlib"
    ],

例子

此规则的错误代码示例：

/*eslint no-restricted-imports: ["error", "fs"]*/

import fs from 'fs';

/*eslint no-restricted-imports: ["error", { "paths": ["cluster"] }]*/

import cluster from 'cluster';

/*eslint no-restricted-imports: ["error", { "patterns": ["lodash/*"] }]*/

import pick from 'lodash/pick';

/*eslint no-restricted-imports: ["error", { paths: [{
    name: "foo",
    importNames: ["default"],
    message: "Please use the default import from '/bar/baz/' instead."
}]}]*/

import DisallowedObject from "foo";

/*eslint no-restricted-imports: ["error", { paths: [{
    name: "foo",
    importNames: ["DisallowedObject"],
    message: "Please import 'DisallowedObject' from '/bar/baz/' instead."
}]}]*/

import { DisallowedObject as AllowedObject } from "foo";

/*eslint no-restricted-imports: ["error", { paths: [{
    name: "foo",
    importNames: ["DisallowedObject"],
    message: "Please import 'DisallowedObject' from '/bar/baz/' instead."
}]}]*/

import * as Foo from "foo";

此规则的正确代码示例：

/*eslint no-restricted-imports: ["error", "fs"]*/

import crypto from 'crypto';

/*eslint no-restricted-imports: ["error", { "paths": ["fs"], "patterns": ["eslint/*"] }]*/

import crypto from 'crypto';
import eslint from 'eslint';

/*eslint no-restricted-imports: ["error", { paths: [{ name: "foo", importNames: ["DisallowedObject"] }] }]*/

import DisallowedObject from "foo"

/*eslint no-restricted-imports: ["error", { paths: [{
    name: "foo",
    importNames: ["DisallowedObject"],
    message: "Please import 'DisallowedObject' from '/bar/baz/' instead."
}]}]*/

import { AllowedObject as DisallowedObject } from "foo";

何时不使用它

如果您希望能够在没有 ESLint 错误或警告的情况下导入项目中的模块，请不要使用此规则，也不要在此规则的列表中包含模块。

版本

此规则在 ESLint 2.0.0-alpha-1 中引入。

资源

• Rule source

• Documentation source