{{ constant('Symfony\\Component\\HttpKernel\\Kernel::VERSION') }} //显示当前symfony的版本#div { opacity: 0; -webkit-animation: fade-in 1s .9s forwards; animation: fade-in 1s .9s forwards;} //渐入动画{{ constant('Symfony\\Component\\HttpKernel\\Kernel::VERSION') }} //显示当前symfony的版本#div { opacity: 0; -webkit-animation: fade-in 1s .9s forwards; animation: fade-in 1s .9s forwards;} //渐入动画