--- /dev/null
+'use strict';
+var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
+var $copyWithin = require('../internals/array-copy-within');
+
+var aTypedArray = ArrayBufferViewCore.aTypedArray;
+var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
+
+// `%TypedArray%.prototype.copyWithin` method
+// https://tc39.es/ecma262/#sec-%typedarray%.prototype.copywithin
+exportTypedArrayMethod('copyWithin', function copyWithin(target, start /* , end */) {
+ return $copyWithin.call(aTypedArray(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
+});