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- 'use strict';
- var $ = require('../internals/export');
- var $findIndex = require('../internals/array-iteration').findIndex;
- var addToUnscopables = require('../internals/add-to-unscopables');
-
- var FIND_INDEX = 'findIndex';
- var SKIPS_HOLES = true;
-
- // Shouldn't skip holes
- // eslint-disable-next-line es/no-array-prototype-findindex -- testing
- if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES = false; });
-
- // `Array.prototype.findIndex` method
- // https://tc39.es/ecma262/#sec-array.prototype.findindex
- $({ target: 'Array', proto: true, forced: SKIPS_HOLES }, {
- findIndex: function findIndex(callbackfn /* , that = undefined */) {
- return $findIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
- }
- });
-
- // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
- addToUnscopables(FIND_INDEX);
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