'use strict'; // Copyright (c) 2020 Ecma International. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-assignment-operators-runtime-semantics-evaluation description: > Strict Mode - TypeError is thrown if the LeftHandSide of a Logical Assignment operator(||=) is a reference to a data property with the attribute value {[[Set]]:undefined} and PutValue step is reached. flags: [onlyStrict] features: [logical-assignment-operators] ---*/ var obj = {}; Object.defineProperty(obj, "prop", { get: function() { return 0; }, set: undefined, enumerable: true, configurable: true }); assert.throws(TypeError, function() { obj.prop ||= 1; }); assert.sameValue(obj.prop, 0, "obj.prop"); reportCompare(0, 0);