Set focus on Extjs textfield

Question

Currently I got problem with setting focus on extjs textfield. When form show, I want to set focus to First name text box and I try to use build in function focus() but stil

Answer 1

Use afterlayout event. Set a flag on the element to prevent focusing multiple times for stability.

afterlayout: function(form) {
  var defaultFocusCmp = form.down('[name=first]');
  if (!defaultFocusCmp.focused) {
    defaultFocusCmp.focus();
    defaultFocusCmp.focused = true;
  }
}