I was trying to call drupal_add_js in the callback of a button. It seems, even with after_build, that this can be done successfully only you are working without cached data.
So, before i start the page, i run drupal_flush_all_caches, and the javascript is successfully added to the page.
The problem is I want to get some user input data from a form, pass to the javascript and exibit the result. The way i'm trying to do, it is getting a string that contains the processed values and concatenating with another string that contains the other part of the javascript (probably this is not a good practice), and calling this string with drupal_add_js. But, when if i call drupal_flush_all_caches, the form will be reset and i will not be able to get the data.
So, my questions are: How can i pass values from a form to a javascript?
Do i need to flush all caches every time to use drupal_add_js?
Is there different solutions to deal with this during development and production?
Thanks for the help guys. I found some answers: How can i pass values from a form to a javascript? I had to name my variable as Drupal.settings.myModule.myVar in the javascript code. This way i can pass variables from php code to javascript. If you want to modify the javascript code you really need to flush caches. Until now, i have not found nothing about differences between production and development best pratices.
