board-controller.js

_onSortLinkClick(evt) {
    evt.preventDefault();

    if (evt.target.tagName !== `A`) {
      return;
    }
    const tasksList = document.querySelector(`.board__tasks`);
    tasksList.innerHTML = ``;

    switch (evt.target.dataset.sortType) {
      case `date-up`:
        const sortedByDateUpTasks = this._tasks.slice().sort((a, b) => a.dueDate - b.dueDate);
        sortedByDateUpTasks.forEach((taskMock) => render(tasksList, this._сreateTask(taskMock)));
        break;
      case `date-down`:
        const sortedByDateDownTasks = this._tasks.slice().sort((a, b) => b.dueDate - a.dueDate);
        sortedByDateDownTasks.forEach((taskMock) => render(tasksList, this._сreateTask(taskMock)));
        break;
      case `default`:
        this._tasks.forEach((taskMock) => render(tasksList, this._сreateTask(taskMock)));
        break;
    }
  }