Strict mode Passingnon-Strict mode Passing
Features:
- Symbol
// Copyright (C) 2015 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-array.prototype.findindex description: > Return abrupt from ToLength(Get(O, "length")) where length is a Symbol. info: | 22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] ) 1. Let O be ToObject(this value). 2. ReturnIfAbrupt(O). 3. Let len be ToLength(Get(O, "length")). 4. ReturnIfAbrupt(len). ... features: [Symbol] ---*/ var o = {}; o.length = Symbol(1); // predicate fn is given to avoid false positives assert.throws(TypeError, function() { [].findIndex.call(o, function() {}); });