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LibJS: Add spec comments to ArrayBuffer.prototype.byteLength

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Jamie Mansfield 2022-02-13 02:33:57 +00:00 • committed by Linus Groh
parent 7aa4c22f6b
commit 04c5bc5e55
1 changed files with 11 additions and 1 deletions
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12
Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.cpp
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@ -127,12 +127,22 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayBufferPrototype::slice)
// 25.1.5.1 get ArrayBuffer.prototype.byteLength, https://tc39.es/ecma262/#sec-get-arraybuffer.prototype.bytelength
JS_DEFINE_NATIVE_FUNCTION(ArrayBufferPrototype::byte_length_getter)
{
// 1. Let O be the this value.
// 2. Perform ? RequireInternalSlot(O, [[ArrayBufferData]]).
auto* array_buffer_object = TRY(typed_this_value(global_object));
// 3. If IsSharedArrayBuffer(O) is true, throw a TypeError exception.
// FIXME: Check for shared buffer
// 4. If IsDetachedBuffer(O) is true, return +0𝔽.
if (array_buffer_object->is_detached())
return Value(0);
return Value(array_buffer_object->byte_length());
// 5. Let length be O.[[ArrayBufferByteLength]].
auto length = array_buffer_object->byte_length();
// 6. Return 𝔽(length).
return Value(length);
}
}