diff --git a/_includes/footer.html b/_includes/footer.html
index a9fe2f1..57d1b24 100644
--- a/_includes/footer.html
+++ b/_includes/footer.html
@@ -62,13 +62,6 @@ WebFont.load({
     families: ['Lato']
   }
 });
-(function () {
-var lei3Po8h = ["support", ["tuna", "tsinghua", "edu", "cn"].join(".")].join("@");
-document.querySelectorAll('a.eib1gieB').forEach(function (el) {
-  el.textConetent=lei3Po8h;
-	el.href=["ma","ilto:"].join("i")+lei3Po8h;
-});
-})();
 </script>
 
 {% fa_svg_generate %}
diff --git a/_src/entrypoints/default.js b/_src/entrypoints/default.js
index 1c0ec0b..8fe85aa 100644
--- a/_src/entrypoints/default.js
+++ b/_src/entrypoints/default.js
@@ -12,3 +12,11 @@ if (siteSuffix) {
     });
   }
 }
+
+const lei3Po8h = ["support", ["tuna", "tsinghua", "edu", "cn"].join(".")].join(
+  "@",
+);
+Array.from(document.querySelectorAll("a.eib1gieB")).forEach((el) => {
+  el.textContent = lei3Po8h;
+  el.href = ["ma", "ilto:"].join("i") + lei3Po8h;
+});