Fetch values when I select data on the table is possible?

I have tried with https://erpnext.org/docs/user/manual/en/customize-erpnext/custom-scripts/custom-script-examples/custom-script-fetch-values-from-master, it’s working well.

My case: The products will be customized for each customer, so each quotation instead of choosing a customer, select the product will display the appropriate information.
I have a question, can I fetch values when I select data on the table?

Thank you so much!

frappe.ui.form.on('Child table name', {
    column_name: function(frm) {
        // You code here

Something like this maybe ?