// Copyright (c) 2012 Ecma International. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- es5id: 11.4.1-4-a-1-s description: > Strict Mode - TypeError is thrown when deleting non-configurable data property flags: [onlyStrict] includes: [runTestCase.js] ---*/ function testcase() { var obj = {}; Object.defineProperty(obj, "prop", { value: "abc", configurable: false }); try { delete obj.prop; return false; } catch (e) { return e instanceof TypeError && obj.prop === "abc"; } } runTestCase(testcase);