production refactor

src/render/components/control/scroll.js

@@ -0,0 +1,24 @@
+let el;
+
+const initScroll = (elementId) => {
+  el = document.getElementById(elementId);
+  el.addEventListener('adjust-scroll', adjustScroll);
+  window.addEventListener('resize', adjustScroll);
+}
+
+const isBottom = () => {
+  if (el) {
+    return el.scrollHeight - el.clientHeight <= el.scrollTop + 1;
+  }
+}
+
+const adjustScroll = () => {
+  if (el) {
+    el.scrollTo({
+      top: el.scrollHeight - el.clientHeight,
+      behavior: 'smooth'
+    });
+  }
+}
+
+export default initScroll;