Function throttle

will delay numerous call to function fn to once per specified threshhold period.

more info : https://css-tricks.com/debouncing-throttling-explained-examples/ to see the visual difference: http://demo.nimius.net/debounce_throttle/

throttle(fn: Function, threshhold?: number, ...args: any[]): () => void
Parameters
- fn: Function
  callback function
- threshhold: number = 250
  period to wait in milliseconds
- ...args: any[]
  the arguments to pass to function fn
Returns () => void
- Defined in cgHtmlUtils.ts:310