will 'group' numerous call to fn if the calls occurs in delay interval parameter more info : https://css-tricks.com/debouncing-throttling-explained-examples/ to see the visual difference: http://demo.nimius.net/debounce_throttle/
callback function to be called
to wait in milliseconds between numerous call
will 'group' numerous call to fn if the calls occurs in delay interval parameter more info : https://css-tricks.com/debouncing-throttling-explained-examples/ to see the visual difference: http://demo.nimius.net/debounce_throttle/