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LibJS: Fix types and small spec discrepancy in ArrayPrototype::includes

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This commit is contained in:
davidot 2021-07-07 14:18:49 +02:00 • committed by Linus Groh
parent cb44fc528b
commit 7a41c758c0
1 changed files with 12 additions and 6 deletions
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18
Userland/Libraries/LibJS/Runtime/ArrayPrototype.cpp
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@ -1367,18 +1367,24 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayPrototype::includes)
return {};
if (length == 0)
return Value(false);
i32 from_index = 0;
u64 from_index = 0;
if (vm.argument_count() >= 2) {
from_index = vm.argument(1).to_i32(global_object);
auto from_argument = vm.argument(1).to_integer_or_infinity(global_object);
if (vm.exception())
return {};
if (from_index >= length)
if (Value(from_argument).is_positive_infinity() || from_argument >= length)
return Value(false);
if (from_index < 0)
from_index = max(length + from_index, 0);
if (Value(from_argument).is_negative_infinity())
from_argument = 0;
if (from_argument < 0)
from_index = max(length + from_argument, 0);
else
from_index = from_argument;
}
auto value_to_find = vm.argument(0);
for (i32 i = from_index; i < length; ++i) {
for (u64 i = from_index; i < length; ++i) {
auto element = this_object->get(i);
if (vm.exception())
return {};