[功能描述](%E5%8A%9F%E8%83%BD%E6%8F%8F%E8%BF%B0.md) [事件绑定](%E4%BA%8B%E4%BB%B6%E7%BB%91%E5%AE%9A.md) [常用示例](%E5%B8%B8%E7%94%A8%E7%A4%BA%E4%BE%8B.md)