.swing-motion(@className, @keyframeName) { .@{className}-enter { .motion-common(); animation-play-state: paused; } .@{className}-enter.@{className}-enter-active { animation-name: ~"@{keyframeName}In"; animation-play-state: running; } } .swing-motion(swing, swing); @keyframes swingIn { 0%, 100% { transform: translateX(0px); } 20% { transform: translateX(-10px); } 40% { transform: translateX(10px); } 60% { transform: translateX(-5px); } 80% { transform: translateX(5px); } }