在 Javascript/ECMAScript 中计算时间跨度

发布于 2024-09-06 15:09:51 字数 481 浏览 5 评论 0原文

我有一个包含毫秒数的变量，它表示从现在到未来指定点的时间跨度。

我想将这个毫秒数字转换为可以向用户显示的时间跨度值。

我知道我可以通过模算术并手动向用户显示结果来完成此操作，但我想使用 Javascript/ECMAScript 内置的 Date() API 来完成此操作。

这就是我生成它的方式：

var timespanInMS = timeInFuture.getTime() - now.getTime();
var diff = new Date( timespanInMS );

alert( "Hours: " + diff.getHours() + " Minutes: " + diff.getMinutes() );

但是，这只在用户的计算机位于 UTC 时区时才有效。如果它们位于太平洋 (UTC-8)，则“diff”的值会相差 16 小时（即使 timespanInMS 数字相同）。

谢谢

原文

I've got a variable that holds a number of miliseconds which represents the timespan from now to a specified point in the future.

I want to convert this milisecond figure into a timespan value I can display to users.

I know I can do this the naive way with modulo arithmetic and manually displaying the result to the user, but I want to do this using the Date() API built-in to Javascript/ECMAScript.

This is how I generate it:

var timespanInMS = timeInFuture.getTime() - now.getTime();
var diff = new Date( timespanInMS );

alert( "Hours: " + diff.getHours() + " Minutes: " + diff.getMinutes() );

However this only works when the user's computer is in the UTC timezone. If they're in Pacific (UTC-8) then the value of 'diff' is off by 16 hours (even though the timespanInMS figure is the same).

Thanks

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