7 Components: the Function Pages - Developers

12.6
TWiki and JavaScript
Employing JavaScript with your TWiki application is practically effortless.
To circumvent TWiki formatting, the JavaScript code
should be masked with an HTML comment and -tags. Here
is an example:
Every time the page is accessed, a message box appears indicating
that JavaScript is active.
12.7
TWiki Variables
TWiki variables fulfill two functions. Firstly, they stand for certain
data that is only employed when the page is invoked and the source
text is displayed in its normal form. For example, the placeholder
%DATE% displays the current date. This can save the author a great
deal of effort, and it makes the page more dynamic. Secondly, a few
variables have a switch function. They enable several settings to be
determined in TWiki. For instance, the %NOAUTOLINK% variable
determines whether CamelCase is active or not.
You can identify a variable by the fact that its name is enclosed in
percent signs; depending on the variable, comments can be inserted
in curly brackets after the name, e.g. for an embedded search for
%SEARCH{"fire"}%. There are pre-defined variables that are set
when the TWiki system is installed or that access information from
the server. Others can be set by the user. Here, we differentiate between
the following options with regard to the area of validity of the
variables:
� Variables applicable to the entire TWiki. They can be defined
and edited on the page TWikiPreferences in the TWiki web.
� Variables set for a certain web. They can be found in the respective
WebPreferences page.
12.6 TWiki and JavaScript �
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