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The problem of tsc typescript compiler not being allowed to run on Windows due to error message of PowerShell Script enablement level

If you're encountering an error message related to the PowerShell Script enablement level when trying to run the TypeScript compiler (tsc) on Windows, it means that the execution policy of PowerShell is restricting the execution of scripts. To fix this issue, you can change the execution policy to allow script execution. Here's how you can do it:

Open a PowerShell terminal with administrative privileges. Right-click on the PowerShell icon and select "Run as administrator".

Check the current execution policy by running the following command:

Get-ExecutionPolicy

If the execution policy is set to "Restricted" or "AllSigned", it means that PowerShell is preventing script execution. To change the execution policy, run the following command:

Set-ExecutionPolicy RemoteSigned

This command sets the execution policy to "RemoteSigned", which allows the execution of locally created scripts but requires digitally signed scripts from remote sources.

Confirm the change by typing "Y" and pressing Enter.

Now you should be able to run the TypeScript compiler (tsc) without encountering the PowerShell Script enablement level error.

Please note that changing the execution policy can have security implications, so it's important to be cautious and only change it if you trust the scripts you are running.

What is the connection between running tsc typescript compiler and PowerShell script security levels

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TypeScript - Wikipediawikipedia·1⁠

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Documentation - tsc CLI Options - TypeScripttypescriptlang·2⁠

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TypeScript Compiling with Visual Studio Codevisualstudio·3⁠

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tsc.ps1 cannot be loaded because running scripts is ...stackoverflow·4⁠

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TypeScript's Migration to Modulesmicrosoft·5⁠

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How to Enable and Utilize the Script Execution Policy in Windows PowerShell - MakeUseOfmakeuseof·6⁠

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The connection between running the TypeScript compiler (tsc) and PowerShell script security levels is that the TypeScript compiler is a command-line tool that is executed using a PowerShell script.

When you run the tsc command in a PowerShell terminal, PowerShell creates a script that invokes the TypeScript compiler and passes the necessary arguments to it.

The PowerShell script that runs the tsc command is subject to the PowerShell script security levels, which control the execution of PowerShell scripts on the system. If the execution policy is set to "Restricted" or "AllSigned", PowerShell may prevent the execution of the tsc script, as it is considered a PowerShell script.

To run the tsc command in a PowerShell terminal, you may need to change the execution policy to allow script execution, as described in previous answers. However, it's important to note that changing the execution policy can have security implications, so it's recommended to be cautious and only change it if you trust the scripts you are running.

Alternatively, you can use other methods to run the TypeScript compiler, such as using a command prompt or a third-party IDE or editor that supports TypeScript. These methods may not be subject to the PowerShell script security levels and may not require changes to the execution policy.

Here are some specific tools and methods that you can use to run the TypeScript compiler:

Command Prompt: You can run the TypeScript compiler (tsc) from the command prompt by navigating to the directory containing the TypeScript file and running the tsc command followed by the name of the TypeScript file. For example, if you have a TypeScript file named app.ts in the C:\myproject directory, you can run the following command to compile it: tsc C:\myproject\app.ts. This method does not require PowerShell and is not subject to the PowerShell script security levels.

Visual Studio Code: Visual Studio Code is a popular open-source code editor that supports TypeScript out of the box. You can install the TypeScript extension for Visual Studio Code to get syntax highlighting, code completion, and other features for TypeScript development. To compile a TypeScript file in Visual Studio Code, you can use the built-in task runner to run the tsc command. You can also configure the task runner to watch for changes in the TypeScript file and automatically recompile it when changes are detected.

Webpack: Webpack is a popular module bundler for JavaScript applications that also supports TypeScript. You can use Webpack to compile TypeScript files and bundle them into a single JavaScript file for deployment. Webpack provides a powerful set of features for optimizing and managing your application's assets, including code splitting, tree shaking, and hot module replacement.

Gulp: Gulp is a popular task runner for JavaScript applications that can be used to automate the compilation of TypeScript files. You can use Gulp to watch for changes in the TypeScript files and automatically recompile them when changes are detected. Gulp provides a simple and flexible way to automate repetitive tasks in your development workflow.

The PowerShell Script enablement level is a security feature in Windows PowerShell that controls the execution of PowerShell scripts. It determines whether PowerShell scripts can be executed on a system and what types of scripts are allowed to run.

The PowerShell Script enablement level has several possible values, including:

Restricted: This is the default setting, which prevents the execution of PowerShell scripts on the system.

AllSigned: This setting allows the execution of PowerShell scripts, but only if they are signed by a trusted publisher.

RemoteSigned: This setting allows the execution of PowerShell scripts that are created locally, as well as those that are downloaded from a remote source and signed by a trusted publisher.

Unrestricted: This setting allows the execution of PowerShell scripts without any restrictions, including unsigned scripts and those downloaded from the internet.

When you try to run the TypeScript compiler (tsc) on Windows, it may encounter issues related to the PowerShell Script enablement level if the execution policy is set to "Restricted" or "AllSigned". This is because PowerShell is preventing the execution of scripts, including the tsc script.

To fix this issue, you can change the execution policy to allow script execution, as described in the previous answer. However, it's important to note that changing the execution policy can have security implications, so it's recommended to be cautious and only change it if you trust the scripts you are running.

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