var datalist = {
    data1: "hoge1",
    data2: "hoge2"
}
localStorage.setItem("datalist", JSON.stringify(datalist));
JSON.parse(localStorage.getItem("datalist"));

Warning: Undefined variable $errorMessage in /home/zumhoqaf/public_html/lineage/local2.php on line 52

localStorageのテキストはありません。