Pretty date

John Resig 製作的一個 format date script: pretty.js

使用方法很簡單, 只要這樣...

<script language="javascript"> prettyDate("2008-01-28T20:24:17Z") // => "2 hours ago" prettyDate("2008-01-27T22:24:17Z") // => "Yesterday" prettyDate("2008-01-26T22:24:17Z") // => "2 days ago" prettyDate("2008-01-14T22:24:17Z") // => "2 weeks ago" </script>

而且這個library實作起來也不麻煩..
不過我個人喜歡把 line: 8 改成 return time;
這樣取得 return value 的時候才不需要再次判斷, 是否有值.

<script language="javascript"> function prettyDate(time){ var date = new Date((time || "").replace(/-/g,"/").replace(/[TZ]/g," ")), diff = (((new Date()).getTime() - date.getTime()) / 1000), day_diff = Math.floor(diff / 86400); if ( isNaN(day_diff) || day_diff < 0 || day_diff >= 31 ) return; // 改成 return time; return day_diff == 0 && ( diff < 60 && "just now" || diff < 120 && "1 minute ago" || diff < 3600 && Math.floor( diff / 60 ) + " minutes ago" || diff < 7200 && "1 hour ago" || diff < 86400 && Math.floor( diff / 3600 ) + " hours ago") || day_diff == 1 && "Yesterday" || day_diff < 7 && day_diff + " days ago" || day_diff < 31 && Math.ceil( day_diff / 7 ) + " weeks ago"; } </script>