Add lib.esnext.temporal (#62628)

Author: Renegade334

src/compiler/commandLineParser.ts

@@ -251,11 +251,13 @@ const libEntries: [string, string][] = [
     // ESNext By-feature options
     ["esnext.array", "lib.esnext.array.d.ts"],
     ["esnext.collection", "lib.esnext.collection.d.ts"],
+    ["esnext.date", "lib.esnext.date.d.ts"],
     ["esnext.decorators", "lib.esnext.decorators.d.ts"],
     ["esnext.disposable", "lib.esnext.disposable.d.ts"],
     ["esnext.error", "lib.esnext.error.d.ts"],
     ["esnext.intl", "lib.esnext.intl.d.ts"],
     ["esnext.sharedmemory", "lib.esnext.sharedmemory.d.ts"],
+    ["esnext.temporal", "lib.esnext.temporal.d.ts"],
     ["esnext.typedarrays", "lib.esnext.typedarrays.d.ts"],
     // Decorators
     ["decorators", "lib.decorators.d.ts"],

src/compiler/utilities.ts

@@ -1953,6 +1953,11 @@ export const getScriptTargetFeatures: () => ScriptTargetFeatures = /* @__PURE__
                 "fromHex",
             ],
         })),
+        Date: new Map(Object.entries({
+            esnext: [
+                "toTemporalInstant",
+            ],
+        })),
         DisposableStack: new Map(Object.entries({
             esnext: emptyArray,
         })),

src/lib/esnext.d.ts

@@ -7,3 +7,5 @@
 /// <reference lib="esnext.error" />
 /// <reference lib="esnext.sharedmemory" />
 /// <reference lib="esnext.typedarrays" />
+/// <reference lib="esnext.temporal" />
+/// <reference lib="esnext.date" />

src/lib/esnext.date.d.ts

@@ -0,0 +1,5 @@
+/// <reference lib="esnext.temporal" />
+
+interface Date {
+    toTemporalInstant(): Temporal.Instant;
+}

src/lib/esnext.intl.d.ts

@@ -1,4 +1,15 @@
+/// <reference lib="esnext.temporal" />
+
 declare namespace Intl {
+    type FormattableTemporalObject = Temporal.PlainDate | Temporal.PlainYearMonth | Temporal.PlainMonthDay | Temporal.PlainTime | Temporal.PlainDateTime | Temporal.Instant;
+
+    interface DateTimeFormat {
+        format(date?: FormattableTemporalObject | Date | number): string;
+        formatToParts(date?: FormattableTemporalObject | Date | number): DateTimeFormatPart[];
+        formatRange(startDate: FormattableTemporalObject | Date | number, endDate: FormattableTemporalObject | Date | number): string;
+        formatRangeToParts(startDate: FormattableTemporalObject | Date | number, endDate: FormattableTemporalObject | Date | number): DateTimeRangeFormatPart[];
+    }
+
     interface Locale {
         /**
          * Returns a list of one or more unique calendar identifiers for this locale.

src/lib/esnext.temporal.d.ts

@@ -88,11 +88,13 @@
         "es2025.regexp",
         "esnext.array",
         "esnext.collection",
+        "esnext.date",
         "esnext.decorators",
         "esnext.disposable",
         "esnext.error",
         "esnext.intl",
         "esnext.sharedmemory",
+        "esnext.temporal",
         "esnext.typedarrays",
         "decorators",
         "decorators.legacy",