From 3fd7fb3e14854306a801c9caa9bb2a89be150718 Mon Sep 17 00:00:00 2001
From: Luca Benci <benci.luca@tuta.io>
Date: Wed, 25 Oct 2017 22:38:44 +0200
Subject: [PATCH] Do not assume elem.selectionStart exists

---
 qutebrowser/javascript/webelem.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/qutebrowser/javascript/webelem.js b/qutebrowser/javascript/webelem.js
index a37fcd6c8..7f17a1209 100644
--- a/qutebrowser/javascript/webelem.js
+++ b/qutebrowser/javascript/webelem.js
@@ -48,12 +48,20 @@ window._qutebrowser.webelem = (function() {
         var id = elements.length;
         elements[id] = elem;
 
+        // InvalidStateError will be thrown if elem doesn't have selectionStart
+        var caret_position = 0;
+        try {
+            caret_position = elem.selectionStart;
+        } catch (e) {
+            // nothing to do, caret_position is already 0
+        }
+
         var out = {
             "id": id,
             "value": elem.value,
             "outer_xml": elem.outerHTML,
             "rects": [],  // Gets filled up later
-            "caret_position": elem.selectionStart,
+            "caret_position": caret_position,
         };
 
         // https://github.com/qutebrowser/qutebrowser/issues/2569