diff --git a/homepage/static/assets/js/mindflow.js b/homepage/static/assets/js/mindflow.js
index 984ebd9..7770fb5 100644
--- a/homepage/static/assets/js/mindflow.js
+++ b/homepage/static/assets/js/mindflow.js
@@ -1,5 +1,3 @@
-const categories = ["update", "diary"];
-
 const buttons = document.getElementsByTagName("button");
 const articles = document.getElementsByTagName("article");
 
@@ -8,9 +6,8 @@ document.getElementById("filter").classList.remove("hidden");
 for (let i = 0; i < buttons.length; ++i)
     if (buttons[i].name !== "")
         buttons[i].addEventListener("click", e => {
-            const category = e.target.name;
             for (let j = 0; j < articles.length; ++j)
-                if (articles[j].id.startsWith(category) || category === "all")
+                if (articles[j].id.startsWith(e.target.name) || e.target.name === "all")
                     articles[j].classList.remove("hidden");
                 else
                     articles[j].classList.add("hidden"); });
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