diff --git a/src/js/categories.js b/src/js/categories.js
new file mode 100644
index 0000000..412f585
--- /dev/null
+++ b/src/js/categories.js
@@ -0,0 +1,6 @@
+window.addEventListener("load", function() {
+  document.querySelector(".addcategory").addEventListener("click", function() {
+    document.querySelector("#addcategory").showModal();
+    /* Or dialog.show(); to show the dialog without a backdrop. */
+  });
+});