combobox: improve props, fix placement with scroll

src/lib/util.ts

@@ -0,0 +1,17 @@
+/**
+ * Generates a unique identifier string unless an identifier is provided.
+ * If a prefix is provided, it will be prepended to the identifier.
+ * The identifier is a combination of a random part and a timestamp.
+ *
+ * @param {string} [prefix] - Optional prefix to prepend to the identifier.
+ * @param {string} [identifier] - Optional identifier to use instead of generating a new one.
+ * @returns {string} - A unique identifier string.
+ */
+export const generateIdentifier = (prefix?: string, identifier?: string): string => {
+	if (identifier) {
+		return `${prefix ? prefix + '-' : ''}${identifier}`;
+	}
+	const randomPart = Math.random().toString(36).substring(2, 10);
+	const timestampPart = Date.now().toString(36);
+	return `${prefix ? prefix + '-' : ''}${randomPart}-${timestampPart}`;
+};