{"ScriptPreparationCode":null,"TestCases":[{"Name":"is","Code":"let x;\r\nObject.is(x,undefined)","IsDeferred":false},{"Name":"IIFE","Code":"let x;\r\nx === (function(window, undefined){\r\n // undefined\r\n}(this))","IsDeferred":false},{"Name":"typeof","Code":"let x;\r\ntypeof(x) === \u0027undefined\u0027","IsDeferred":false},{"Name":"void","Code":"let x;\r\nx === void(0)","IsDeferred":false}]}