Updated API reference.

timer/timer.d.ts

@@ -1,7 +1,25 @@
 /**
-  * Timer functions.
-  */
+* Calls a function after a specified delay.
+* @param callback The function to be called.
+* @param milliseconds The time to wait before the function is called. Defaults to 0.
+*/
 export declare function setTimeout(callback: Function, milliseconds?: number): number;
+
+/**
+* Clears the delay set by a call to the setTimeout function.
+* @param id The identifier returned by the previously called setTimeout() method.
+*/
 export declare function clearTimeout(id: number): void;
+
+/**
+* Calls a function repeatedly with a delay between each call.
+* @param callback The function to be called.
+* @param milliseconds The delay between each function call.
+*/
 export declare function setInterval(callback: Function, milliseconds?: number): number;
+
+/**
+* Clears repeated function which was set up by calling setInterval().
+* @param id The identifier returned by the setInterval() method.
+*/
 export declare function clearInterval(id: number): void;