Install TypeScript
Refer to the TypeScript's site: https://www.typescriptlang.org/index.html#download-links
Microsoft Windows [Version 6.1.7601] Copyright (c) 2009 Microsoft Corporation. All rights reserved. C:\windows\system32>npm install -g typescript npm http GET https://registry.npmjs.org/typescript npm http 304 https://registry.npmjs.org/typescript C:\Users\genhan.chen\AppData\Roaming\npm\tsserver -> C:\Users\genhan.chen\AppData\Roaming\npm\node_modules\typescript\bin\tsserver C:\Users\genhan.chen\AppData\Roaming\npm\tsc -> C:\Users\genhan.chen\AppData\Roaming\npm\node_modules\typescript\bin\tsc typescript@1.8.10 C:\Users\genhan.chen\AppData\Roaming\npm\node_modules\typescript
Then, you need to add the installation directory (C:\Users\genhan.chen\AppData\Roaming\npm), which varies from different computers, into the environmental variable list.