How to setup a typescript environment for your codewars locally

Setting up Typescript

Note: I have a preference to not install typescript globally and only per project. This setup utilizes vscode.

Create your project folder and navigate into it.
Create a sub folder "src", in your project folder, in which you will place your code.
in the integrated CLI, from your project folder, run the following command
```
yarn add -D typescript ts-node
```
Run the following command in the CLI to initialize the typescript setup
```
npx tsc --init
```

configure the generated tsconfig.json to your liking. Here are my settings for example.

{
 "compilerOptions": {
     "target": "es2016" ,
     "experimentalDecorators": true ,
     "module": "CommonJS" ,
     "rootDir": "./src" ,
     "moduleResolution": "node" ,
     "sourceMap": true ,
     "outDir": "./dist" ,
     "removeComments": true ,
     "noEmitOnError": true ,
     "esModuleInterop": true ,
     "forceConsistentCasingInFileNames": true ,
     "strict": true ,
     "noUnusedLocals": true ,
     "noUnusedParameters": true ,
     "noImplicitReturns": true ,
     "noImplicitOverride": true ,
     "allowUnreachableCode": false ,
     "skipLibCheck": true 
 }
}

Set up debugging by opening debugger and create a new "launch.json" file.
```
"preLaunchTask": "tsc: build - tsconfig.json",
```
Add the above line, above the "outFiles" line in "launch.json".
Finally to run your code, create a new typescript file, for example "myfile.ts", and from the CLI
```
npx ts-node ./src/myfile.ts
```
The output to your script will be in the terminal.

Optional: Setting up testing

Install mocha and chai

yarn add -D chai mocha @types/chai @types/mocha

Modify "package.json" add "test": "mocha --require ts-node/register src/**/*.ts" to your scripts key.
For simplicity I write the solution and test in the same file. Note too that I name the test similarly to the solution being solved. This will come in handy for running single test.
Run the test yarn test --grep "Reverse words"
I use the name of the test to run ONLY that single test. As we probably do not want to run all test.