If in one dom element has block and element, how switch to block?

[zoxon]

textarea.textarea.textarea__control

$('.textarea').each(function(index, el) {
    var $that = $(this);
    var $control = $that.elem('control');

    $control.focusin(function(event) {
        $(this).block().mod('focused', true);
    });

    $control.focusout(function(event) {
        $(this).block().mod('focused', false);
    });
});

JqueryBEM add modifer to element .textarea.textarea__control_focused

http://codepen.io/Zoxon/pen/wGRrQo