How to install Typescript and check version ? 056

 How to install Typescript and check version ?

Installing and Checking TypeScript Version

There are two common ways to install and check the version of TypeScript:

1. Globally using npm:

This is suitable if you want to use TypeScript for various projects on your system.

Installation:

Bash

npm install -g typescript

Checking Version:

• Method 1:

Bash

tsc -v

This command runs the TypeScript compiler (tsc) with the -v flag to display the version.

• Method 2:

Bash

npm list typescript -g

This command lists installed global packages, including TypeScript, and shows their versions.

2. Locally within a project:

This is preferred if you want to use TypeScript specifically for a particular project.

Installation:

1. Make sure you have Node.js and npm installed (usually included with Node.js).

2. Open a terminal in your project directory.

3. Initialize a package.json file (if not already there):

Bash

npm init -y

4. Install TypeScript as a development dependency:

Bash

npm install --save-dev typescript

Checking Version:

• Method 1:

Bash

npx tsc -v

This uses the npm-installed TypeScript (npx) to run the compiler and display the version.

• Method 2:

Bash

cat package.json | grep typescript

This searches the package.json file for the "typescript" dependency and shows its version.

Additional notes:

• The latest version of TypeScript at the time of writing (February 16, 2024) is 5.3.

• You can also specify a specific version during installation, e.g., npm install --save-dev typescript@4.8.4.

• For more information and advanced usage, refer to the official TypeScript documentation: https://www.typescriptlang.org/