Do blink animation with ext.js

blinkingAnimation.js

function blinkingAnimation(evt, el, o) {
    var target = Ext.get(o.element || el);
  
    var blink = {
            run: function () {
                target.fadeOut(100);
                target.fadeIn(100);
            },
            interval: 200,
            repeat: o.repeat || 10
        };

    return Ext.TaskMgr.start(blink);
}

Ext.select("#doBlinkingAnimation").on('click', blinkingAnimation, this, {'element': 'hello', 'repeat': 3});

test.html

<p id="hello">Hello World</p>
<a href="javascript:;" id="doblink">Blink!</a>