How to add script codes to widgets?

Hello all,

Is there a way to add script codes to widget?

I have tried this in a text widget but didn’t work:

<script type="text/javascript">

var vglnk = { api_url: '//api.viglink.com/api',

key: '537b172bf21b171b513d3fab4668f7c0' };

(function(d, t) {

var s = d.createElement(t); s.type = 'text/javascript'; s.async = true;

s.src = ('https:' == document.location.protocol ? vglnk.api_url :

'//cdn.viglink.com/api') + '/vglnk.js';

var r = d.getElementsByTagName(t)[0]; r.parentNode.insertBefore(s, r);

}(document, 'script'));

</script>

Thanks in advanced.