TypeScript - static

In TypeScript, you cannot define an entire class as static but you can however define it's members. When you do this, you do not need to instantiate a new object to access those members.

When members of a class are public (not static), you access them using the this keyword. When members of a class are static, you call them by prefixing the call with the class name and non the this keyword...even within the same class.

class Logger
{
static LogInfo(message: string): void
    {
        console.log(message);
    }

static LogError(message: string): void
    {
        console.error(message);

        // see how we call it by using the class name instead of 'this'?
        Logger.LogInfo("An error occurred...");
    }
}

window.onload = function ()
{
    // see how I didn't need to instantiate the class as an object?
Logger.LogInfo("hello there");
Logger.LogError("danger!");
};