{"ScriptPreparationCode":"var list = document.getElementById(\u0027list\u0027);\r\n\r\nfor(i=0; i\u003C1000; i\u002B\u002B){\r\n const newEl = document.createElement(\u0027div\u0027);\r\n newEl.setAttribute(\u0027data-index\u0027, String(i));\r\n list.appendChild(newEl);\r\n}\r\n\r\nvar items = list.children;\r\nvar item = items.item(500);","TestCases":[{"Name":"indexOf","Code":"Array.prototype.indexOf.call(items, item);","IsDeferred":false},{"Name":"data-index","Code":"item.getAttribute(\u0027data-index\u0027)","IsDeferred":false}]}