Substitution variable in javascript

Question

Can you use the value substitution variables like WORKSPACE_IMAGES and IMAGE_PREFIX in a javascript function? When I use the $v function to retrieve the value it returns undefined.

Answer 1

Hello peter,
>> Can you use the value substitution variables like WORKSPACE_IMAGES and IMAGE_PREFIX in a javascript function?
The actual substitution action is performed by the APEX engine as part of the rendering page process. That means that the substitution string must be available to the APEX engine, and for JavaScript code it can happens only for inline code.
If you are using an external JavaScript file, you can’t use substitution strings directly. All the variables that the JavaScript code can use must be part of the current page. That’s why the APEX engine automatically adds some very common (and very needy) substitution strings, like APP_ID, APP_PAGE_ID and SESSION, as hidden item on every page. You can mimic this to add the specific substitution strings you need.
In your page template, you can add something like:
<script type="text/javascript">
var workspaceImage = '&WORKSPACE_IMAGE.';
var imagePrefix = '&IMAGE_PREFIX.';
</script>As these variables are declared outside any specific JavaScript function, they will be defined as global variables, and as such will be available to all your JavaScript functions in the external file. Adding it to your page template will make them available on all your application pages.
Regards,
Arie.
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