Method push

packages/core/src/lib/list-unit.ts:430–444

* Appends new items to the list-value. \ * Dispatches a new copy of the value, without mutating the current-value. * * It only works if the Unit is not frozen, and at least 1 item is provided. * * @param items The items to be appended to the list. * @returns The new length

(...items: Item[])

   * @category Customised Array.prototype
   */
  push(...items: Item[]): number {
    if (this.isFrozen || !items.length) {
      return this.length;
    }
    this.checkSerializabilityMaybe(items);

    const listShallowCopy = [...this.rawValue()];
    const newLength = listShallowCopy.push(...this.deepCopyMaybe(items));
    this.updateValueAndCache(listShallowCopy);

    if (this.eventsSubject?.observers.length && !this.isMuted) {
      this.eventsSubject.next(new EventListUnitPush(items));
    }
    return newLength;
  }

  /**
   * Removes the last item from the list-{@link value} and returns it. \