Posted by GoVegan on 07 Dec 2014 02:57, last edited by GoVegan on 07 Dec 2014 07:18
Tags:
Variables are powerful tools used in Wikidot's Live Templates, modules and includes.
%%tags%% is an example of a variable. If a page has no tags, then using this variable will render nothing. If a page is tagged, then those tags will be displayed.
If you want a certain category to display a list of tags at the top of each page, then you may use the following code:
This page has the following tags: %%tags%%If the page has tags, the following could be rendered:
This page has the following tags: diet fitness health
However, if the page has no tags, the following will be rendered:
This page has the following tags:
As you can see, this does not appear professional.
Continue reading this "How to …" if you want to:
- Show content if a variable is blank or has a null value
OR Hide content only if a variable has a value - Show content only if a variable has a value
OR Hide content if a variable is blank or has a null value
For the purpose of demonstrating working examples, this document will use %%tags%% as the conditional variable. Of course, %%tags%% could be replaced with any other existing variable, and the code will still function as expected.
How to render if variable is blank
If you want to display content if a variable is blank, use the following syntax:
[!----%%VARIABLE%%]CONDITIONAL CONTENT[!----]A practical use for this code could be to inform your users that "This page has not been tagged."
[!----%%tags%%]This page has not been tagged.[!----]How to render if variable has a value
Hiding content when a variable is blank is a little more complicated to do, however it is possible by extending on the code from the previous section.
If you want to display content if a variable has a value, and is not blank, use the following syntax:
[!----%%VARIABLE%%][%%VARIABLE%%!--]CONDITIONAL CONTENT[!----]A practical use for this code is the same example used in the introduction of this document:
[!----%%tags%%][%%tags%%!--]This page has the following tags: %%tags%%[!----]You may note from the above example, that you can use the conditional variable within the content you wish to display.
Author
James Kanjo. Please visit his/her userPage.