This feature is not Baseline because it does not work in some of the most widely-used browsers.
The sign accessor property of Temporal.Duration instances returns 1 if this duration is positive, -1 if negative, and 0 if zero. Because a duration never has mixed signs, the sign of a duration is determined by the sign of any of its non-zero fields.
const d1 = Temporal.Duration.from({ hours: 1, minutes: 30 });
const d2 = Temporal.Duration.from({ hours: -1, minutes: -30 });
const d3 = Temporal.Duration.from({ hours: 0 });
console.log(d1.sign); // 1
console.log(d2.sign); // -1
console.log(d3.sign); // 0
console.log(d1.abs().sign); // 1
console.log(d2.abs().sign); // 1
console.log(d3.abs().sign); // 0
console.log(d1.negated().sign); // -1
console.log(d2.negated().sign); // 1
console.log(d3.negated().sign); // 0
| Specification |
|---|
| Temporal> # sec-get-temporal.duration.prototype.sign> |
| Desktop | Mobile | Server | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | Bun | Deno | Node.js | |
sign |
144 | 144 | 139 | No | preview | 144 | 139 | No | No | No | 144 | No | ? | 1.40 | No |
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/Duration/sign