Temporal.PlainTime.prototype.since()
since() 方法用于 Temporal.PlainTimeTemporal.DurationTemporal.PlainTime.from()
此方法执行 this - other。要执行 other - this，请使用 until()
语法
since(other)
since(other, options)
参数
其他-
一个字符串、对象或
Temporal.PlainTimeTemporal.PlainTime.from()Temporal.PlainTime对象。 options可选-
包含
Temporal.Duration.prototype.round()largestUnit、roundingIncrement、roundingMode和smallestUnit。largestUnit和smallestUnit仅接受以下单位：“hours”、“minutes”、“seconds”、“milliseconds”、“microseconds”、“nanoseconds”或它们的单数形式。对于largestUnit，默认值"auto"表示"hours"。对于smallestUnit，默认值为"nanoseconds"。
返回值
一个表示从 other 到此时间的时间差（since）的新的 Temporal.Durationother 在此时间之前，则时间差为正；如果在此时间之后，则为负。
异常
RangeError-
如果任何选项无效，则抛出。
示例
使用 since()
const lunchTime = Temporal.PlainTime.from("12:30:00");
const now = Temporal.Now.plainTimeISO();
const duration = now.since(lunchTime);
console.log(`You had lunch ${duration.toLocaleString("en-US")} ago`);
// Example output: "You had lunch 3 hr, 42 min, 21 sec, 343 ms, 131 μs, 718 ns ago"
const duration2 = now.since(lunchTime, { smallestUnit: "minutes" });
console.log(`You had lunch ${duration2.toLocaleString("en-US")} ago`);
// Example output: "You had lunch 3 hr, 42 min ago"
const duration3 = now.since(lunchTime, {
largestUnit: "minutes",
smallestUnit: "minutes",
});
console.log(`You had lunch ${duration3.toLocaleString("en-US")} ago`);
// Example output: "You had lunch 222 min ago"
舍入结果
默认情况下，smallestUnit 的小数部分会被截断。你可以使用 roundingIncrement 和 roundingMode 选项对其进行舍入。
const time1 = Temporal.PlainTime.from("12:30:00");
const time2 = Temporal.PlainTime.from("12:30:01");
const duration = time2.since(time1, {
smallestUnit: "seconds",
roundingIncrement: 15,
roundingMode: "ceil",
});
console.log(duration.toString()); // "PT15S"
规范
| 规范 |
|---|
| Temporal # sec-temporal.plaintime.prototype.since |
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