Show Time field with "HH:mm" format

Frappe Framework Customization
1

Hi team,
I need to show in the time field only hours and minutes in the Sales Invoice(Posting Time field).
I tried

onload_post_render: function(frm) { 
        $("input[data-fieldname=posting_time]").removeClass("hasDatepicker").timepicker({
             timeFormat: 'HH:mm',
         });
   },

but it seems the system cannot find field. It seems that Posting Time field is reloaded after onload_post_render hook. Can someone please check it also or give me some advices how to handle it. Thanks

2

Workaround:

Add one more field, read only small text or html so it can render time as per your requirement. momentjs is available.

3

Thank for your answer.