Shopify, clean custom vars LiveChat Inc.

<script type="text/javascript">
    window.__lc = window.__lc || {};
    window.__lc.license = 'licence_number';
    function strip_tags(input, allowed) {
      allowed = (((allowed || '') + '')
        .toLowerCase()
        .match(/<[a-z][a-z0-9]*>/g) || [])
        .join(''); // making sure the allowed arg is a string containing only tags in lowercase (<a><b><c>)
      var tags = /<\/?([a-z][a-z0-9]*)\b[^>]*>/gi,
        commentsAndPhpTags = /<!--[\s\S]*?-->|<\?(?:php)?[\s\S]*?\?>/gi;
      return input.replace(commentsAndPhpTags, '')
        .replace(tags, function($0, $1) {
          return allowed.indexOf('<' + $1.toLowerCase() + '>') > -1 ? $0 : '';
        });
    };

    var totalPrice = strip_tags('{{ cart.total_price | money }}');
    window.__lc.params = [
    { name: 'Cart', value: totalPrice },
    { name: 'Order number', value: '{{ order.order_number }}' }
    ];
    (function() {
    var lc = document.createElement('script'); lc.type = 'text/javascript'; lc.async = true;
    lc.src = ('https:' == document.location.protocol ? 'https://' : 'http://') + 'cdn.livechatinc.com/tracking.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(lc, s);
    })();
</script>