How to install older version of Typescript?

When installing an older version of TypeScript, you can achieve this through several methods, primarily by using npm (Node Package Manager). Here are the specific steps:

Step 1: Open the command-line tool

This can be Terminal on macOS or Linux, or Command Prompt or PowerShell on Windows.

Step 2: Install a specific version of TypeScript

To install a specific version of TypeScript via npm, you need to know the exact version number you want to install. You can use the following command:

bash
npm install typescript@version

For example, if you want to install version 3.5.3 of TypeScript, you can use:

bash
npm install typescript@3.5.3

Step 3: Verify the installation

After installation, you can verify that the correct version was installed using the following command:

bash
tsc --version

This command will display the current TypeScript version, confirming it matches the version you installed.

Example

For instance, if you need to use version 3.5.3 of TypeScript in a project because some changes in newer versions may be incompatible with the existing code, you would follow the steps above to ensure the project runs smoothly.

Note

• Ensure that npm is installed on your computer before installing TypeScript. npm is typically installed alongside Node.js.
• If you are working on an existing project, you may also need to update the TypeScript version number in the package.json file to ensure other developers are using the correct version.

By following these steps, you can flexibly manage TypeScript versions to ensure compatibility with your project or meet specific development requirements.