spothole/webassets/js/ham-utils/storage.js

let useLocalStorage = true;

// Save settings to local storage. Suppressed if "use local storage" is false.
function saveSettings() {
    if (useLocalStorage) {
        // Find all storeable UI elements, store a key of "element id:property name" mapped to the value of that
        // property. For a checkbox, that's the "checked" property.
        $(".storeable-checkbox").each(function() {
            localStorage.setItem("#" + $(this)[0].id + ":checked", JSON.stringify($(this)[0].checked));
        });
        $(".storeable-select").each(function() {
            localStorage.setItem("#" + $(this)[0].id + ":value", JSON.stringify($(this)[0].value));
        });
        $(".storeable-text").each(function() {
            localStorage.setItem("#" + $(this)[0].id + ":value", JSON.stringify($(this)[0].value));
        });
    }
}

// Load settings from local storage and set up the filter selectors. Suppressed if "use local storage" is false.
function loadSettings() {
    if (useLocalStorage) {
        // Find all local storage entries and push their data to the corresponding UI element
        Object.keys(localStorage).forEach(function(key) {
            if (key.startsWith("#") && key.includes(":")) {
                // Split the key back into an element ID and a property
                var split = key.split(":");
                $(split[0]).prop(split[1], JSON.parse(localStorage.getItem(key)));
            }
        });
    }
}