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-rw-r--r--js/reveal.js3
1 files changed, 3 insertions, 0 deletions
diff --git a/js/reveal.js b/js/reveal.js
index 10c609e..e772516 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -1500,6 +1500,9 @@
'<div class="spinner"></div>',
'<div class="viewport">',
'<iframe src="'+ url +'"></iframe>',
+ '<small class="viewport-inner">',
+ 'This link is refused to display in a frame due to its policy',
+ '</small>',
'</div>'
].join('');