TypeScript - upgrade TypeScript compiler (global tsc upgrade)

In this short article, we would like to show how to upgrade TypeScript compiler.

Quick solution:

npm -g upgrade typescript

or upgrade to the latest major version:

npm -g install typescript

Hints:

• install run on installed package causes package upgrade to latest major version,
• use sudo under Linux, e.g.
  sudo npm -g upgrade typescript
sudo npm -g install typescript
• sometimes it may be necessary to restart or reload terminal to see the effect.

Detailed description

Open a terminal and do the following steps (in some cases as root, superuser or administrator):

1. check TypeScript version with the command:

   tsc -v

    
2. run upgrade with the command:

   npm -g upgrade typescript

   under Linux use:

   sudo npm -g upgrade typescript

   where: -g means global installation mode
    
3. restart or reload terminal to be sure the package version was reloaded,
    
4. check TypeScript version again:

   tsc -v

Note: the presented steps work on different platforms (Windows, Linux, etc.).

Practical example:

$ tsc -v
Version 3.3.3333

$ npm -g upgrade typescript
C:\Users\john\AppData\Roaming\npm\tsc -> C:\Users\john\AppData\Roaming\npm\node_modules\typescript\bin\tsc
C:\Users\john\AppData\Roaming\npm\tsserver -> C:\Users\john\AppData\Roaming\npm\node_modules\typescript\bin\tsserver
+ typescript@3.9.6
updated 1 package in 13.424s

$ tsc -v
Version 3.9.6