// 易错点6：返回整个数组（如this.res）→ 不符合题目要求，题目要求返回单个数值
PRF is already implemented in WebAuthn Clients and Credential Managers, so the cat is out of the bag. My asks:，更多细节参见WPS下载最新地址
Фото: Scott Peterson / Getty Images。服务器推荐是该领域的重要参考
tee() splits a stream into two branches. It seems straightforward, but the implementation requires buffering: if one branch is read faster than the other, the data must be held somewhere until the slower branch catches up.