diff --git a/docs/main.js b/docs/main.js
index 49f52a8..6787e8e 100644
--- a/docs/main.js
+++ b/docs/main.js
@@ -17,13 +17,19 @@ PDFJS.workerSrc = './shared/pdf.worker.js';
 
 // Render stuff
 let NUM_PAGES = 0;
+let renderedPages = {};
 document.getElementById('content-wrapper').addEventListener('scroll', function (e) {
   let visiblePageNum = Math.round(e.target.scrollTop / PAGE_HEIGHT) + 1;
   let visiblePage = document.querySelector(`.page[data-page-number="${visiblePageNum}"][data-loaded="false"]`);
+
   if (visiblePage) {
-    setTimeout(function () {
-      UI.renderPage(visiblePageNum, RENDER_OPTIONS);
-    });
+    // Prevent invoking UI.renderPage on the same page more than once.
+	if ( !renderedPages[visiblePageNum] ) {
+	  renderedPages[visiblePageNum] = true;
+	  setTimeout(function () {
+		UI.renderPage(visiblePageNum, RENDER_OPTIONS);
+	  });
+	}
   }
 });
 
diff --git a/scripts/web b/scripts/web
index ba17dd5..1e46924 100755
--- a/scripts/web
+++ b/scripts/web
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 ./scripts/shared
-cp -rf shared/ docs/shared/
+cp -rf shared docs
 
 server=./node_modules/.bin/webpack-dev-server
-$server --inline --config ./webpack.web.js --content-base web/
+$server --inline --config ./webpack.web.js --content-base docs/ $*
\ No newline at end of file