= parseInt( this.minutesInput.value ) || 0;
        const seconds = parseInt( this.secondsInput.value ) || 0;
        this.setTime( minutes, seconds );
      }

      toggleTimer() {
        if ( this.isRunning ) {
          this.pauseTimer();
        } else {
          this.startTimer();
        }
      }

      startTimer() {
        this.isRunning = true;
        this.lastUpdateTime = Date.now();
        this.updatePlayPauseButton();

        this.interval = setInterval( () => {
          const now = Dat