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LibJS: Implement Date.prototype.getTimezoneOffset

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Timothy Flynn 2022-01-15 00:48:49 -05:00 • committed by Linus Groh
parent 032664332b
commit 6576d0291c
2 changed files with 36 additions and 4 deletions
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10
Userland/Libraries/LibJS/Runtime/DatePrototype.cpp
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@ -245,13 +245,15 @@ JS_DEFINE_NATIVE_FUNCTION(DatePrototype::get_time)
// 21.4.4.11 Date.prototype.getTimezoneOffset ( ), https://tc39.es/ecma262/#sec-date.prototype.gettimezoneoffset
JS_DEFINE_NATIVE_FUNCTION(DatePrototype::get_timezone_offset)
{
auto* this_object = TRY(typed_this_object(global_object));
// 1. Let t be ? thisTimeValue(this value).
auto time = TRY(this_time_value(global_object, vm.this_value(global_object)));
if (!Value(this_object->date_value()).is_finite_number())
// 2. If t is NaN, return NaN.
if (time.is_nan())
return js_nan();
// FIXME: Make this actually do something once we support timezones instead of just UTC
return Value(0);
// 3. Return (t - LocalTime(t)) / msPerMinute.
return Value((time.as_double() - local_time(time.as_double())) / Date::ms_per_minute);
}
// 21.4.4.12 Date.prototype.getUTCDate ( ), https://tc39.es/ecma262/#sec-date.prototype.getutcdate