First install meteor on your system if you dont have it ( https://www.meteor.com/install )

curl https://install.meteor.com/ | sh

Install the dependencies and devDependencies .

npm install

Start Server and vistid http://localhost:3000/

npm start

If all worked correctly you should see

Before IF

After IF

But you see this

Before IF

false ? SHOULD NOT SHOW : null

After IF