https://wiki.returnofreckoning.com/index.php?action=history&feed=atom&title=API%3ADoesWindowExistAPI:DoesWindowExist - Revision history2026-10-17T22:25:46ZRevision history for this page on the wikiMediaWiki 1.43.11https://wiki.returnofreckoning.com/index.php?title=API:DoesWindowExist&diff=30277&oldid=prevMaintenance script: UI Lua API import (WAR 1.4.8)2026-10-16T19:42:00Z<p>UI Lua API import (WAR 1.4.8)</p>
<p><b>New page</b></p><div>{{LuaApi|group=Window}}<br />
Returns whether a window with the given name exists.<br />
<br />
<pre><br />
exists = DoesWindowExist(windowName)<br />
</pre><br />
<br />
== Arguments ==<br />
;windowName : <code>string</code> – Name of the window.<br />
<br />
== Returns ==<br />
;exists : <code>boolean</code> – <code>true</code> if the window exists and is not waiting to be destroyed.<br />
<br />
== Details ==<br />
* A window that has been passed to <code>DestroyWindow</code> is removed later, not at once. Until then it can still be found by name, but <code>DoesWindowExist</code> already returns <code>false</code> for it.<br />
* This is the usual way to avoid the ''Window %s does not exist'' errors of the other window functions.<br />
* Exactly one argument must be passed. With a missing or non-string argument the function raises the generic ''Invalid Parameters'' message and returns nothing.<br />
<br />
== Errors ==<br />
None besides the generic ''Invalid Parameters'' message.<br />
<br />
== Example ==<br />
From <code>default/easystem_eventtext/source/system_eventtext.lua</code>:<br />
<pre><br />
if( EA_System_EventText.loading or ( DoesWindowExist( "LoadingWindow" ) and WindowGetShowing( "LoadingWindow" ) ) )<br />
</pre><br />
<br />
== See also ==<br />
* [[API:WindowGetShowing|WindowGetShowing]]<br />
* [[API:WindowSetShowing|WindowSetShowing]]</div>Maintenance script