update method of communication between iframe and embed script

2018-02-16 00:07:17 +02:00
parent 1e4704d01e
commit fdc3188155
2 changed files with 19 additions and 8 deletions
@@ -9,5 +9,14 @@
 <body>
 <div id="remark42"></div>
 <script type="text/javascript" src="/web/remark.js"></script>
+<script>
+  var lastHeight = 0;
+  setInterval(() => {
+    if (document.body.offsetHeight !== lastHeight) {
+      lastHeight = document.body.offsetHeight;
+      window.parent.postMessage(JSON.stringify({ remarkIframeHeight: lastHeight }), '*');
+    }
+  }, 200);
+</script>
 </body>
 </html>