Strict mode Passingnon-Strict mode Passing
Features:
- ∅
// Copyright (C) 2016 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-string.prototype.substr es6id: B.2.3.1 description: Behavior when "this" value is not Object-coercible info: | 1. Let O be ? RequireObjectCoercible(this value). ---*/ var substr = String.prototype.substr; assert.sameValue(typeof substr, 'function'); assert.throws(TypeError, function() { substr.call(undefined); }, 'undefined'); assert.throws(TypeError, function() { substr.call(null); }, 'null');