Plugin Development: Sending PHP values to JS - Dev

8 Aug 2022 · _config.inc.php_VALUE_


      Anyone have experience in plugin coding for Roundcube?
I am in the process of creating a light weight plugin for adding a stay-logged-in checkbox on the login page. It doesn't use/add any DB columns or create extra cookies. It only modifies the existing two cookies that roundcube already sets by extending their expiration from session-only to several days.
The part i could use help with, is the template for adding the html checkbox is in javascript.
I am not seeing how to get a value from config.inc.php into javascript.
As of now i have to set the same value in both the php and javascript files.
Or if there is a way to inject the HTML from the PHP instead of needing to use JS i would prefer that.
PHP:
function loginTemplate($args) {
    $this->add_texts('localization', true);
    $this->include_script('stay_loggedin.js');
    return $args;
}
JAVASCRIPT:
$(document).ready(function () {
    if (window.rcmail && window.rcmail.env.skin == 'elastic') {
        rcmail.addEventListener('init', function () {
            ...
            ...
            let days = ???_config.inc.php_VALUE_???;
            ...
            ...
        });
    }
});