Real-Life Example

<label> Toggle Mode: </label>
 <input type="checkbox" name="toggle-darkmode" id="toggle-darkmode">


// Save preference
const savePreference = (isDarkMode) => {
    localStorage.setItem("darkMode", isDarkMode);
};

// Load preference
const loadPreference = () => {
    const darkMode = localStorage.getItem("darkMode") === "true";
    document.body.style.backgroundColor = darkMode ? "black" : "white";
};

// Simulate toggling
document.getElementById("toggle-darkmode").addEventListener("click", () => {
    const isDarkMode = document.body.style.backgroundColor === "white";
    savePreference(isDarkMode);
    loadPreference();
});