[Solved] Frappe: cur_frm.add_custom_button() does not add a Custom-Button

TKramer Asks: Frappe: cur_frm.add_custom_button() does not add a Custom-Button
I’m creating custom-buttons in a Client Script. This code works:

Code:
// Buttons do appear, everything is fine
frappe.ui.form.on('Article', {
    refresh(frm) {
        frm.add_custom_button("Hello", () => { 
            msgprint("Hello");
        }, "Greet");
        frm.add_custom_button("Ciao", () => { 
            msgprint("Ciao");
        }, "Greet");
}

Then I thought about creating the buttons outside the events with cur_frm, which doesn’t work. Why is this so?

Code:
// Buttons don't appear
cur_frm.add_custom_button("Hello", () => { 
    msgprint("Hello");
}, "Greet");
cur_frm.add_custom_button("Ciao", () => { 
    msgprint("Ciao");
}, "Greet");

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