添加類名:
document.getElementById('navBar').getElementsByClassName('mui-tab-item')[0].classList.add('mui-active');
删除類名:
document.getElementById('navBar').getElementsByClassName('mui-tab-item')[1].classList.remove('mui-active');
添加類名:
document.getElementById('navBar').getElementsByClassName('mui-tab-item')[0].classList.add('mui-active');
删除類名:
document.getElementById('navBar').getElementsByClassName('mui-tab-item')[1].classList.remove('mui-active');