+
+
+ ArrayBufferCopyAndDetach (
+ _arrayBuffer_: an ECMAScript language value,
+ _newLength_: an ECMAScript language value,
+ _preserveResizability_: ~preserve-resizability~ or ~fixed-length~,
+ ): either a normal completion containing an ArrayBuffer or a throw completion
+
+
+
+ 1. Perform ? RequireInternalSlot(_arrayBuffer_, [[ArrayBufferData]]).
+ 1. If IsSharedArrayBuffer(_arrayBuffer_) is *true*, throw a *TypeError* exception.
+ 1. If _newLength_ is *undefined*, then
+ 1. Let _newByteLength_ be _arrayBuffer_.[[ArrayBufferByteLength]].
+ 1. Else,
+ 1. Let _newByteLength_ be ? ToIndex(_newLength_).
+ 1. If IsDetachedBuffer(_arrayBuffer_) is *true*, throw a *TypeError* exception.
+ 1. If _preserveResizability_ is ~preserve-resizability~ and IsFixedLengthArrayBuffer(_arrayBuffer_) is *false*, then
+ 1. Let _newMaxByteLength_ be _arrayBuffer_.[[ArrayBufferMaxByteLength]].
+ 1. Else,
+ 1. Let _newMaxByteLength_ be ~empty~.
+ 1. If _arrayBuffer_.[[ArrayBufferDetachKey]] is not *undefined*, throw a *TypeError* exception.
+ 1. Let _newBuffer_ be ? AllocateArrayBuffer(%ArrayBuffer%, _newByteLength_, _newMaxByteLength_).
+ 1. Let _copyLength_ be min(_newByteLength_, _arrayBuffer_.[[ArrayBufferByteLength]]).
+ 1. Let _fromBlock_ be _arrayBuffer_.[[ArrayBufferData]].
+ 1. Let _toBlock_ be _newBuffer_.[[ArrayBufferData]].
+ 1. Perform CopyDataBlockBytes(_toBlock_, 0, _fromBlock_, 0, _copyLength_).
+ 1. NOTE: Neither creation of the new Data Block nor copying from the old Data Block are observable. Implementations may implement this method as a zero-copy move or a `realloc`.
+ 1. Perform ! DetachArrayBuffer(_arrayBuffer_).
+ 1. Return _newBuffer_.
+
+
+
IsDetachedBuffer (
@@ -43101,6 +43135,17 @@ ArrayBuffer.prototype.constructor
The initial value of `ArrayBuffer.prototype.constructor` is %ArrayBuffer%.
+
+ get ArrayBuffer.prototype.detached
+ `ArrayBuffer.prototype.detached` is an accessor property whose set accessor function is *undefined*. Its get accessor function performs the following steps:
+
+ 1. Let _O_ be the *this* value.
+ 1. Perform ? RequireInternalSlot(_O_, [[ArrayBufferData]]).
+ 1. If IsSharedArrayBuffer(_O_) is *true*, throw a *TypeError* exception.
+ 1. Return IsDetachedBuffer(_O_).
+
+
+
get ArrayBuffer.prototype.maxByteLength
`ArrayBuffer.prototype.maxByteLength` is an accessor property whose set accessor function is *undefined*. Its get accessor function performs the following steps when called:
@@ -43188,6 +43233,24 @@ ArrayBuffer.prototype.slice ( _start_, _end_ )
+
+ ArrayBuffer.prototype.transfer ( [ _newLength_ ] )
+ This method performs the following steps when called:
+
+ 1. Let _O_ be the *this* value.
+ 1. Return ? ArrayBufferCopyAndDetach(_O_, _newLength_, ~preserve-resizability~).
+
+
+
+
+ ArrayBuffer.prototype.transferToFixedLength ( [ _newLength_ ] )
+ This method performs the following steps when called:
+
+ 1. Let _O_ be the *this* value.
+ 1. Return ? ArrayBufferCopyAndDetach(_O_, _newLength_, ~fixed-length~).
+
+
+
ArrayBuffer.prototype [ @@toStringTag ]
The initial value of the @@toStringTag property is the String value *"ArrayBuffer"*.