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

That works for me. In textfield or textarea add listeners config:

listeners:{
            afterrender:'onRender'
        }

After, in your controller write function:

onRender:function(field){
    Ext.defer(()=>{
        field.focus(false,100);
    },1);
}

Ext.defer is wrap for setTimout(). Without Ext.defer() field.focus() doesn't work and i don't why. You cant write that function in listeners config instead of using controller's function name, but good practice is hold functions in component's controller. Good luck.