On version 13 you can load custom script on list view
frappe.listview_settings[‘Invoice’] = {
button: {
show: function(doc) {
return true;
},
get_label: function() {
return __(‘PDF’);
},
get_description: function(doc) {
return (‘Print {0}’, [doc.name])
},
action: function(doc) {
//frappe.set_route(“/app/print/Invoice/” + doc.name);
var objWindowOpenResult = window.open(frappe.urllib.get_full_url(“/api/method/frappe.utils.print_format.download_pdf?”
+ “doctype=” + encodeURIComponent(“Invoice”)
+ “&name=” + encodeURIComponent(doc.name)
+ “&trigger_print=0”
+ “&format=invoice print format”
+ “&no_letterhead=0”
+ “&_lang=en”
));
if(!objWindowOpenResult) {
msgprint((“Please set permission for pop-up windows in your browser!”)); return;
}
}
}
}
Check this blog for reference: How to add Button link in Doctype list View ? - Frappe Framework - Aadhil PM