You can watch this created in https://TBC
Alternatively,
Run this below command to run your Mocha scripts with TypeScript.
cd WEBDRIVERIO_MASTER/TypeScript/Mocha
npm install
npm test
Here i have created sample.ts where you can play around based on the Hints provided to feel the power of typescript
TypeScriptSyntax.ts file shows some examples of how TypeScript can be used.