--- /dev/null
+'use strict';
+var $ = require('../internals/export');
+var $findLastIndex = require('../internals/array-iteration-from-last').findLastIndex;
+var addToUnscopables = require('../internals/add-to-unscopables');
+
+// `Array.prototype.findLastIndex` method
+// https://github.com/tc39/proposal-array-find-from-last
+$({ target: 'Array', proto: true }, {
+ findLastIndex: function findLastIndex(callbackfn /* , that = undefined */) {
+ return $findLastIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+ }
+});
+
+addToUnscopables('findLastIndex');