_Added in 1.8.10_

*<notextile>on <level>:TOPIC:<#|*>:<commands></notextile>*

Triggers when the channel topic is changed.

_See also [[/topic]], [[$topic]]._

_Haltable using ^_

*Parameters*

<level> - The [[User Access Level]] for the event to trigger.
<#|*> - The [[Matchtarget]] to listen to.
<commands> - The commands to be performed when the event listener's criteria is met.

*Example*

<pre>
on *:TOPIC:*:echo -ag $nick changed topic on $chan to $topic
</pre>