Cancellable debounce

debounce.js

  function debounce(cb, time) {
    var handle = null;
    var func = function() {
      func.cancel();
      handle = setTimeout(cb, time);
    };
    func.cancel = function() {
      if (!handle) return;
      clearTimeout(handle);
      handle = null;
    };
    return func;
  }

  var func = debounce(function() { console.log("call"); }, 200);
  func();
  func();
  func();
  func.cancel();
  func();
  func();
  func();