JSON.xx / localStorage

Method	Description
JSON.parse()	字串轉物件	JSON.parse('{"a":1}') // {a: 1}
JSON.stringify()	物件轉字串	let obj = {a: 1} JSON.stringify(obj) // '{"a":1}'

localStorage / SessionStorage

Method	Description
localStorage.set("name", "內容")	內容只能是字串
localStorage.get("name")
sessionStorage.set("name", "內容")	browser 關閉就沒了
sessionStorage.get("name")