How can I get value in config_override.php via js

Hi all,

I would like to get parameters in config_override.php pass into .hbs via js controller

I try with this code below but doesn't work.

var custom = app.lang.getAppListStrings('custom_value');
this.testData = custom;

then return:

[object Object]

How to do this ?

Sugarcrm 7.6

Thanks,

M