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An object may be given in any context where a Temporal.Instant is expected (see ToTemporalInstant). There is no conversion from a property bag to an Instant, unlike with other Temporal types. Instead the object is converted to a string, and if its toString() method yields a valid ISO string, the conversion succeeds. (An object with the default Object.prototype.toString will not.)
18 lines
590 B
JavaScript
18 lines
590 B
JavaScript
// Copyright (C) 2022 Igalia, S.L. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-temporal.instant.from
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description: Object is converted to a string, then to Temporal.Instant
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features: [Temporal]
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---*/
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const arg = {};
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assert.throws(RangeError, () => Temporal.Instant.from(arg), "[object Object] is not a valid ISO string");
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arg.toString = function() {
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return "1970-01-01T00:00Z";
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};
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const result = Temporal.Instant.from(arg);
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assert.sameValue(result.epochNanoseconds, 0n, "result of toString is interpreted as ISO string");
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