問題描述
目標:找到本地時間和UTC時間偏移，然后構造如下格式的URL.
Goal: Find the local time and UTC time offset then construct the URL in following format.
示例網址:/Actions/Sleep?duration=2002-10-10T12:00:00?05:00
格式基于W3C 推薦.文檔說:
例如，2002-10-10T12:00:00?05:00(2002 年 10 月 10 日中午，美國中部夏令時和東部標準時間)等于 2002-10-10T17:00:00Z，比 2002-10-10T12:00:00Z 晚五個小時.
For example, 2002-10-10T12:00:00?05:00 (noon on 10 October 2002, Central Daylight Savings Time as well as Eastern Standard Time in the U.S.) is equal to 2002-10-10T17:00:00Z, five hours later than 2002-10-10T12:00:00Z.
所以根據我的理解，我需要通過 new Date() 找到我的當地時間，然后使用 getTimezoneOffset() 函數計算差異，然后將其附加到字符串結束.
So based on my understanding, I need to find my local time by new Date() then use getTimezoneOffset() function to compute the difference then attach it to the end of string.
使用
格式
var local = new Date().format("yyyy-MM-ddThh:mm:ss"); // 2013-07-02T09:00:00
按小時獲取 UTC 時間偏移量
Get UTC time offset by hour
var offset = local.getTimezoneOffset() / 60; // 7
構造 URL(僅限時間部分)
Construct URL (time part only)
var duration = local + "-" + offset + ":00"; // 2013-07-02T09:00:00-7:00
以上輸出表示我的當地時間是 2013/07/02 上午 9 點，與 UTC 的差異是 7 小時(UTC 比當地時間早 7 小時)
The above output means my local time is 2013/07/02 9am and difference from UTC is 7 hours (UTC is 7 hours ahead of local time)
到目前為止，它似乎有效，但如果 getTimezoneOffset() 返回負值，如 -120?
So far it seems to work but what if getTimezoneOffset() returns negative value like -120?
我想知道在這種情況下格式應該是什么樣子，因為我無法從 W3C 文檔中弄清楚.
I'm wondering how the format should look like in such case because I cannot figure out from W3C documentation.
推薦答案
這是一個簡單的幫助函數，它將為您格式化 JS 日期.
Here's a simple helper function that will format JS dates for you.
function toIsoString(date) {
var tzo = -date.getTimezoneOffset(),
dif = tzo >= 0 ? '+' : '-',
pad = function(num) {
var norm = Math.floor(Math.abs(num));
return (norm < 10 ? '0' : '') + norm;
};
return date.getFullYear() +
'-' + pad(date.getMonth() + 1) +
'-' + pad(date.getDate()) +
'T' + pad(date.getHours()) +
':' + pad(date.getMinutes()) +
':' + pad(date.getSeconds()) +
dif + pad(tzo / 60) +
':' + pad(tzo % 60);
}
var dt = new Date();
console.log(toIsoString(dt));這篇關于如何在 JavaScript 中使用 ISO 8601 格式化帶有時區偏移的日期?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！