int64/uint64 as bigint in JS (#21613)

* int64/uint64 as bigint in JS

* fix CI

* convert to compile option

* fix lie

* smaller diff, changelog entry

1 files changed, 9 insertions, 2 deletions

diff --git a/lib/js/jscore.nim b/lib/js/jscore.nim
index 781e8fd57..5147b550d 100644
--- a/lib/js/jscore.nim
+++ b/lib/js/jscore.nim
@@ -13,7 +13,7 @@
 ## specific requirements and solely targets JavaScript, you should be using
 ## the relevant functions in the `math`, `json`, and `times` stdlib
 ## modules instead.
-import std/private/since
+import std/private/[since, jsutils]
 
 when not defined(js):
   {.error: "This module only works on the JavaScript platform".}
@@ -74,9 +74,16 @@ proc parse*(d: DateLib, s: cstring): int {.importcpp.}
 proc newDate*(): DateTime {.
   importcpp: "new Date()".}
 
-proc newDate*(date: int|int64|string): DateTime {.
+proc newDate*(date: int|string): DateTime {.
   importcpp: "new Date(#)".}
 
+whenJsNoBigInt64:
+  proc newDate*(date: int64): DateTime {.
+    importcpp: "new Date(#)".}
+do:
+  proc newDate*(date: int64): DateTime {.
+    importcpp: "new Date(Number(#))".}
+
 proc newDate*(year, month, day, hours, minutes,
              seconds, milliseconds: int): DateTime {.
   importcpp: "new Date(#,#,#,#,#,#,#)".}