# 回调属性 1. [onMessage](tcp-connection/on-message.html) 2. [onClose](tcp-connection/on-close.html) 3. [onBufferFull](tcp-connection/on-buffer-full.html) 4. [onBufferDrain](tcp-connection/on-buffer-drain.html) 5. [onError](tcp-connection/on-error.html)