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// .data(): lives as long as the element, any type $("#modal").data("lastTab", "settings"); // localStorage: persists across page reloads, strings only localStorage.setItem("theme", "dark"); const theme = localStorage.getItem("theme"); // JSON.stringify/parse for objects: localStorage.setItem("user", JSON.stringify({ id: 1, name: "Alice" })); const user = JSON.parse(localStorage.getItem("user"));
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