{"ScriptPreparationCode":"const element = document.getElementById(\u0027element\u0027);","TestCases":[{"Name":"Adding and removing event listeners","Code":"const callback = () =\u003E { console.log(\u0027x\u0027) }\r\n\r\nelement.addEventListener(\u0027click\u0027, callback);\r\nelement.removeEventListener(\u0027click\u0027, callback);","IsDeferred":false},{"Name":"Null","Code":"null","IsDeferred":false}]}