How to validate hyphens and slashes on my field

ERPNext
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1

I have a field called vehicle no where user should enter the license plate no of the vehicle, so no hypens and slashes are allowed what should i do

2

Hi @ESP_Luffy,

Please apply the client script for that.

frappe.ui.form.on('Your DocType', {
    validate: function(frm) {
        var vehicle_no = frm.doc.vehicle_no;
        if (vehicle_no && (vehicle_no.includes('-') || vehicle_no.includes('/'))) {
            frappe.msgprint(__("Vehicle number cannot contain hyphens or slashes."));
            frappe.validated = false;
        }
    }
});

Thank You!