I'm creating a page template for a plone-based website. I've defined some variables using the template attribute language:

<tal:macro metal:define-macro="sample" tal:define="var python: here.getThisVar();">

Now I would like to use var in an extern javascript file, that I call by clicking a button inside my template. How can I transfer my variable, that I can work with it in my javascript file?

I'm creating a page template for a plone-based website. I've defined some variables using the template attribute language:

<tal:macro metal:define-macro="sample" tal:define="var python: here.getThisVar();">

Now I would like to use var in an extern javascript file, that I call by clicking a button inside my template. How can I transfer my variable, that I can work with it in my javascript file?

• javascript
• plone
• zope

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3 Answers 3

Sorted by: Reset to default 8

In your template define a javascript variable by writing it out using TAL like this:

<script type="text/javascript" tal:content="string:var MY_VAR=${view/myVar};"></script>

Now MY_VAR should be available in scope of your external js as long as you call it after the line above...

Another way: inject your variable into HTML using an HTML 5 data attribute::

<div id="myVar" tal:attributes="data-myVar python:here.getThisVar();">

Then read it using JAvaScript/jQuery::

$('#myVar').data('myVar');

There are a variety of ways to do it. All involve constructing Javascript code as if it's text, then returning the result for insertion into a page or rendering as a JS resource in the javascript registry.

If you'd like a robust example that includes provisions for message translatability and works with the JS resource registry, see the way Plone itself does it: https://github./plone/Products.CMFPlone/blob/4.2.7/Products/CMFPlone/browser/jsvariables.py