--- /dev/null
+'use strict';
+var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
+var $reduce = require('../internals/array-reduce').left;
+
+var aTypedArray = ArrayBufferViewCore.aTypedArray;
+var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
+
+// `%TypedArray%.prototype.reduce` method
+// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reduce
+exportTypedArrayMethod('reduce', function reduce(callbackfn /* , initialValue */) {
+ return $reduce(aTypedArray(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+});