File: src/Installer/skins/js/config.js.twig

var ledger_defaults = {
    "file": "~/tmp/logs",
    "database": "airship_logs"
};

var old_driver = "{{ config.ledger.driver|e("html_attr")|default("file") }}";

$("#ledger_driver").on('change', function(e) {
    var new_driver = $("#ledger_driver").val();
    // Update label
    if (new_driver === "file") {
        $("#ledger_details_label").html("Log Directory:");
    } else {
        $("#ledger_details_label").html("Database Table:");
    }
    
    // Swap out details:
    ledger_defaults[old_driver] = $("#ledger_details").val();
    $("#ledger_details").val(
        ledger_defaults[new_driver]
    );
    
    // Update the reference to the current driver
    old_driver = new_driver;
});