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path: root/app/assets/javascripts/behaviors/preview_markdown.js
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-rw-r--r--app/assets/javascripts/behaviors/preview_markdown.js4
1 files changed, 4 insertions, 0 deletions
diff --git a/app/assets/javascripts/behaviors/preview_markdown.js b/app/assets/javascripts/behaviors/preview_markdown.js
index 35874140bf9..b2571fb840c 100644
--- a/app/assets/javascripts/behaviors/preview_markdown.js
+++ b/app/assets/javascripts/behaviors/preview_markdown.js
@@ -36,6 +36,10 @@ MarkdownPreview.prototype.showPreview = function($form) {
mdText = $form.find('textarea.markdown-area').val();
+ if (mdText === undefined) {
+ return;
+ }
+
if (mdText.trim().length === 0) {
preview.text(this.emptyMessage);
this.hideReferencedUsers($form);