fix: specify type of elem parameter

Close #82

Author: javier-godoy

src/main/resources/META-INF/resources/frontend/code-viewer.ts

@@ -449,11 +449,11 @@ pre[class*="language-"] {
             div.style.top= `calc( ${top}px + 0.75em)`;
             div.style.height= `${height}px`;
 
-            const scrollIntoView = elem => {
-                if ((elem as any).scrollIntoViewIfNeeded) {
-                    (elem as any).scrollIntoViewIfNeeded();
+            const scrollIntoView = (elem : any) => {
+                if (elem.scrollIntoViewIfNeeded) {
+                    elem.scrollIntoViewIfNeeded();
                 }  else {
-                    (elem as any).scrollIntoView()
+                    elem.scrollIntoView();
                 }
             }