add hw2

node_modules/@iconify/utils/lib/icon-set/tree.js

@@ -0,0 +1,24 @@
+/**
+* Resolve icon set icons
+*
+* Returns parent icon for each icon
+*/
+function getIconsTree(data, names) {
+	const icons = data.icons;
+	const aliases = data.aliases || Object.create(null);
+	const resolved = Object.create(null);
+	function resolve(name) {
+		if (icons[name]) return resolved[name] = [];
+		if (!(name in resolved)) {
+			resolved[name] = null;
+			const parent = aliases[name] && aliases[name].parent;
+			const value = parent && resolve(parent);
+			if (value) resolved[name] = [parent].concat(value);
+		}
+		return resolved[name];
+	}
+	(names || Object.keys(icons).concat(Object.keys(aliases))).forEach(resolve);
+	return resolved;
+}
+
+export { getIconsTree };