Function scheduleTask

packages/zone.js/lib/common/timers.ts:36–56

(task: Task)

  const tasksByHandleId: {[id: number]: Task} = {};

  function scheduleTask(task: Task) {
    const data = <TimerOptions>task.data;
    data.args[0] = function () {
      return task.invoke.apply(this, arguments);
    };

    const handleOrId = setNative!.apply(window, data.args);

    // Whlist on Node.js when get can the ID by using `[Symbol.toPrimitive]()` we do
    // to this so that we do not cause potentally leaks when using `setTimeout`
    // since this can be periodic when using `.refresh`.
    if (isNumber(handleOrId)) {
      data.handleId = handleOrId;
    } else {
      data.handle = handleOrId;
      // On Node.js a timeout and interval can be restarted over and over again by using the `.refresh` method.
      data.isRefreshable = isFunction(handleOrId.refresh);
    }

    return task;
  }

  function clearTask(task: Task) {
    const {handle, handleId} = task.data!;