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MIRROR: javascript for 🐜's, a tiny runtime with big ambitions ant.themackabu.dev
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function check(label, cond, detail) { if (!cond) { failed++; console.log("FAIL", label, detail || ""); }}
const msZ = Date.parse("2026-02-27T12:00:00Z");check("Date.parse Z", msZ === 1772193600000, msZ);
const dZ = new Date("2026-02-27T12:00:00Z");check("new Date Z toISOString", dZ.toISOString() === "2026-02-27T12:00:00.000Z", dZ.toISOString());
const dDateOnly = new Date("2026-02-27");check("date-only is UTC midnight", dDateOnly.toISOString() === "2026-02-27T00:00:00.000Z", dDateOnly.toISOString());
const dClone = new Date(dZ);check("clone from Date object", dClone.getTime() === dZ.getTime(), dClone.getTime() + " vs " + dZ.getTime());
const msOff = Date.parse("2026-02-27T12:00:00+02:30");const msOffRef = Date.parse("2026-02-27T09:30:00Z");check("timezone offset", msOff === msOffRef, msOff + " vs " + msOffRef);
const invalidParse = Date.parse("not-a-date");check("invalid parse is NaN", invalidParse !== invalidParse, invalidParse);
const invalidDate = new Date("not-a-date");const invalidTime = invalidDate.getTime();check("invalid date getTime is NaN", invalidTime !== invalidTime, invalidTime);
if (failed > 0) throw new Error("test_date_parse_string failed");