Editing Help:CS1 errors (section)

=== Preview messages ===
When editors preview an article, MediaWiki displays a preview message box under the Preview header.  When {{cs1}} and {{cs2}} templates have error or maintenance messages, [[Module:Citation/CS1]] summarizes those messages in the preview message box.  Such a message box might look something like this:
<div style="margin-left:1.6em; display: block" class="cdx-message cdx-message--warning">
{{int:Previewnote}} <span class="mw-continue-editing"> [[#editform|→ Go to editing area]]</span>

Script warning: {{color|#3a3|One or more {{mono|<nowiki>{{</nowiki>[[Template:cite book|cite book]]<nowiki>}}</nowiki>}} templates have maintenance messages}}; messages may be hidden ([[Help:CS1_errors#Controlling_error_message_display|help]]).

Script warning: {{color|#d33|One or more {{mono|<nowiki>{{</nowiki>[[Template:cite journal|cite journal]]<nowiki>}}</nowiki>}} templates have errors}}; messages may be hidden ([[Help:CS1_errors#Controlling_error_message_display|help]]).
</div>

The summary messages have three components:
#'Script warning:' – this prefix is provided by MediaWiki;
#a colored ({{color|#3a3|green maintenance}} or {{color|#d33|red error}}) message that identifies the type of template that has a message with a link to that template's documentation; wrapper templates with messages will show the name of the wrapped template, and;
#'messages may be hidden' – the message suffix with a help link to this page.
Preview messages in the preview message box cannot be hidden.  The preview message suffix 'messages may be hidden' means that the template's message(s) may not be visible.  To learn how to show or hide template messages, see the next section ({{slink||Error and maintenance messages}}).