Can't access "$(formObject)" in onRendered()

help
1

I can’t access

formTmpl.onRendered(function () {
    console.log(this.$('[name="myname"]'));
    console.log(this.find('[name="myname"]'));
});

It show

jQuery.fn.init[0]
context
:
div.box.box-default.color-palette-box
length
:
0
prevObject
:
jQuery.fn.init[0]
__proto__
:
Object[0]

----------

null

but I can access it on event().