在 Hacker News Daily 上看到「Safari tries to fill username」這個 Safari 的 "feature"。
作者發現網站在 Safari 上會出現登入的提示功能，像是這樣：
本來以為是 bug，但實際測過後看起來像是 feature，但抓字串的方法很容易誤判，看起來是抓 welcome back 這組字串：
On further consideration I don't think it's a bug. I think Safari is assuming any page with "Welcome Back" on it is a login page and enabling this behaviour. Therefore I think it's intended.
然後作者也有找到 workaround，用 去閃偵測：
Nice one. I found that using a non-breaking space prevents the behaviour.
>p>welcome back</p>
其他人也有發現其他的字串也會中獎：
It seems the same applies to "Sign In"
"Log in" works too. I tried a couple other languages (Finnish, German, French, Chinese) but the issue/feature seems to only happen with English (although I did use Google Translate, so I can't guarantee I used the right idioms).
目前看起來遇到就只能先 workaround 了...