vue : 无法加载文件 C:\Users\jianfei\AppData\Roaming\npm\vue.ps1，因为在此系统上禁止运行脚本。

背景

在新电脑上配置vue环境

PS E:\CODE_PROJ\myvue\vue23\P61_使用脚手架\vue_test> npm install -g @vue/cli
npm WARN deprecated source-map-url@0.4.1: See https://github.com/lydell/source-map-url#deprecated
npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated
npm WARN deprecated apollo-datasource@3.3.2: The `apollo-datasource` package is part of Apollo Server v2 and v3, which are now deprecated (end-of-life October 22nd 2023). See https://www.apollographql.com/docs/apollo-server/previous-versions/ for more details.
npm WARN deprecated apollo-server-errors@3.3.1: The `apollo-server-errors` package is part of Apollo Server v2 and v3, which are now deprecated (end-of-life October 22nd 2023). This package's functionality is now found in the `@apollo/server` package. See https://www.apollographql.com/docs/apollo-server/previous-versions/ for more details.
npm WARN deprecated source-map-resolve@0.5.3: See https://github.com/lydell/source-map-resolve#deprecated
npm WARN deprecated apollo-server-types@3.8.0: The `apollo-server-types` package is part of Apollo Server v2 and v3, which are now deprecated (end-of-life October 22nd 2023). This package's functionality is now found in the `@apollo/server` package. See https://www.apollographql.com/docs/apollo-server/previous-versions/ for more details.
npm WARN deprecated apollo-server-plugin-base@3.7.2: The `apollo-server-plugin-base` package is part of Apollo Server v2 and v3, which are now deprecated (end-of-life October 22nd 2023). This package's functionality is now found in the `@apollo/server` package. See https://www.apollographql.com/docs/apollo-server/previous-versions/ for more details.
npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated
npm WARN deprecated apollo-server-express@3.12.0: The `apollo-server-express` package is part of Apollo Server v2 and v3, which are now deprecated (end-of-life October 22nd 2023). This package's functionality is now found in the `@apollo/server` package. See https://www.apollographql.com/docs/apollo-server/previous-versions/ for more details.
npm WARN deprecated shortid@2.2.16: Package no longer supported. Contact Support at https://www.npmjs.com/support for more info.
npm WARN deprecated apollo-reporting-protobuf@3.4.0: The `apollo-reporting-protobuf` package is part of Apollo Server v2 and v3, which are now deprecated (end-of-life October 22nd 2023). This package's functionality is now found in the `@apollo/usage-reporting-protobuf` package. See https://www.apollographql.com/docs/apollo-server/previous-versions/ for more details.
npm WARN deprecated apollo-server-env@4.2.1: The `apollo-server-env` package is part of Apollo Server v2 and v3, which are now deprecated (end-of-life October 22nd 2023). This package's functionality is now found in the `@apollo/utils.fetcher` package. See https://www.apollographql.com/docs/apollo-server/previous-versions/ for more details.
npm WARN deprecated subscriptions-transport-ws@0.11.0: The `subscriptions-transport-ws` package is no longer maintained. We recommend you use `graphql-ws` instead. For help migrating Apollo software to `graphql-ws`, see https://www.apollographql.com/docs/apollo-server/data/subscriptions/#switching-from-subscriptions-transport-ws    For general help using `graphql-ws`, see https://github.com/enisdenjo/graphql-ws/blob/master/README.md
npm WARN deprecated apollo-server-core@3.12.0: The `apollo-server-core` package is part of Apollo Server v2 and v3, which are now deprecated (end-of-life October 22nd 2023). This package's functionality is now found in the `@apollo/server` package. See https://www.apollographql.com/docs/apollo-server/previous-versions/ for more details.

changed 867 packages in 31s
PS E:\CODE_PROJ\myvue\vue23\P61_使用脚手架\vue_test> vue -v
vue : 无法加载文件 C:\Users\jianfei\AppData\Roaming\npm\vue.ps1，因为在此系统上禁止运行脚本。有关详细信息，请参阅 https:/go.microsoft.com/fwlink/?LinkID=135170
 中的 about_Execution_Policies。
所在位置 行:1 字符: 1
+ vue -v
+ ~~~
    + CategoryInfo          : SecurityError: (:) []，PSSecurityException
    + FullyQualifiedErrorId : UnauthorizedAccess
PS E:\CODE_PROJ\myvue\vue23\P61_使用脚手架\vue_test>

原因

Windows系统默认禁止运行脚本，导致无法执行Vue CLI的命令。解决这个问题的方法是更改执行策略。

解决办法

以管理员身份打开PowerShell：在开始菜单中找到PowerShell，在其上单击右键，并选择“以管理员身份运行”。

1.输入以下命令以更改执行策略为RemoteSigned：
Set-ExecutionPolicy RemoteSigned
2.在出现的提示中，输入"Y"来确认更改。
现在，应该能够在PowerShell中正常运行Vue CLI的命令了。可以再次尝试运行vue -v来检查Vue CLI的版本。

3.如果您想要在其他方式下运行脚本，也可以使用以下命令来更改执行策略：
Set-ExecutionPolicy Unrestricted

请注意，更改执行策略可能会增加系统的安全风险。建议在执行脚本时采取谨慎措施，只运行来自可信来源的脚本。