On click button change their label in child doctype?

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1

HI everyone, I have trip button in child doctype with each row. I want to change their label from “Start” to “End” whenever the button is clicked.
frappe.ui.form.on('Child Doctype,{
start:function(frm,cdt,cdn){
let row = locals[cdt][cdn];
frm.change_custom_button_type(cdt,cdn,‘Start’, ‘End’, ‘danger’);
}
})

start is button type in doctype.

2

Try to make two buttons, one for each job, and hide the start button when clicking and show and end button instead and so .on

3

Thanks Omar!

How I can two buttons in child doctype table?