# no-useless-rename
不允许将导入、导出和解构的分配重命名为相同的名称
一些该规则报告的问题可以通过 --fix 命令行选项 自动修复
ES2015 允许重命名 import 和 export 语句中的引用以及解构赋值。这为程序员在重命名这些引用时执行这些操作提供了简洁的语法:
import { foo as bar } from "baz";
export { foo as bar };
let { foo: bar } = baz;
使用此语法,可以将引用重命名为相同名称。这是一个完全多余的操作,因为这与根本不重命名是一样的。例如,这个:
import { foo as foo } from "bar";
export { foo as foo };
let { foo: foo } = bar;
是相同的:
import { foo } from "bar";
export { foo };
let { foo } = bar;
# 规则详情
此规则不允许将导入、导出和解构分配重命名为相同名称。
# 选项
此规则允许使用以下选项进行更细粒度的控制:
ignoreImport
:设置为true
时,此规则不检查导入ignoreExport
:设置为true
时,此规则不检查导出ignoreDestructuring
:设置为true
时,此规则不检查解构分配
默认情况下,所有选项都设置为 false
:
"no-useless-rename": ["error", {
"ignoreDestructuring": false,
"ignoreImport": false,
"ignoreExport": false
}]
默认情况下,此规则的错误代码示例:
/*eslint no-useless-rename: "error"*/
import { foo as foo } from "bar";
import { "foo" as foo } from "bar";
export { foo as foo };
export { foo as "foo" };
export { foo as foo } from "bar";
export { "foo" as "foo" } from "bar";
let { foo: foo } = bar;
let { 'foo': foo } = bar;
function foo({ bar: bar }) {}
({ foo: foo }) => {}
默认情况下此规则的正确代码示例:
/*eslint no-useless-rename: "error"*/
import * as foo from "foo";
import { foo } from "bar";
import { foo as bar } from "baz";
import { "foo" as bar } from "baz";
export { foo };
export { foo as bar };
export { foo as "bar" };
export { foo as bar } from "foo";
export { "foo" as "bar" } from "foo";
let { foo } = bar;
let { foo: bar } = baz;
let { [foo]: foo } = bar;
function foo({ bar }) {}
function foo({ bar: baz }) {}
({ foo }) => {}
({ foo: bar }) => {}
此规则的正确代码示例(带有 { ignoreImport: true }
):
/*eslint no-useless-rename: ["error", { ignoreImport: true }]*/
import { foo as foo } from "bar";
此规则的正确代码示例(带有 { ignoreExport: true }
):
/*eslint no-useless-rename: ["error", { ignoreExport: true }]*/
export { foo as foo };
export { foo as foo } from "bar";
此规则的正确代码示例(带有 { ignoreDestructuring: true }
):
/*eslint no-useless-rename: ["error", { ignoreDestructuring: true }]*/
let { foo: foo } = bar;
function foo({ bar: bar }) {}
({ foo: foo }) => {}
# 何时不使用
如果您不关心重复地重命名导入、导出和解构分配,则可以安全地禁用此规则。
# 兼容性
JSCS
:disallowIdenticalDestructuringNames