Facebook Pixel

facebook-pixel-tracking.js

(function (window, document) {
    if (window.myfbq) return;
    window.myfbq = (function () {
        if (arguments.length > 0) {
            var pixelId, trackType, contentObj;

            if (typeof arguments[0] == 'string') pixelId = arguments[0];
            if (typeof arguments[1] == 'string') trackType = arguments[1];
            if (typeof arguments[2] == 'object') contentObj = arguments[2];

            var params = [];
            if (typeof pixelId === 'string' && pixelId.replace(/\s+/gi, '') != '' &&
            typeof trackType === 'string' && trackType.replace(/\s+/gi, '')) {
                params.push('id=' + encodeURIComponent(pixelId));
                switch (trackType) {
                    case 'PageView':
                    case 'ViewContent':
                    case 'Search':
                    case 'AddToCart':
                    case 'InitiateCheckout':
                    case 'AddPaymentInfo':
                    case 'Lead':
                    case 'CompleteRegistration':
                    case 'Purchase':
                    case 'AddToWishlist':
                        params.push('ev=' + encodeURIComponent(trackType));
                        break;
                    default:
                        return;
                }

                params.push('dl=' + encodeURIComponent(document.location.href));
                if (document.referrer) params.push('rl=' + encodeURIComponent(document.referrer));
                params.push('if=false');
                params.push('ts=' + new Date().getTime());

                if (typeof contentObj == 'object') {
                    for (var u in contentObj) {
                        if (typeof contentObj[u] == 'object' && contentObj[u] instanceof Array) {
                            if (contentObj[u].length > 0) {
                                for (var y = 0; y < contentObj[u].length; y++) { contentObj[u][y] = (contentObj[u][y] + '').replace(/^\s+|\s+$/gi, '').replace(/\s+/gi, ' ').replace(/,/gi, '§'); }
                                params.push('cd[' + u + ']=' + encodeURIComponent(contentObj[u].join(',').replace(/^/gi, '[\'').replace(/$/gi, '\']').replace(/,/gi, '\',\'').replace(/§/gi, '\,')));
                            }
                        }
                        else if (typeof contentObj[u] == 'string')
                            params.push('cd[' + u + ']=' + encodeURIComponent(contentObj[u]));
                    }
                }

                params.push('v=' + encodeURIComponent('2.7.19'));

                var imgId = new Date().getTime();
                var img = document.createElement('img');
                img.id = 'fb_' + imgId, img.src = 'https://www.facebook.com/tr/?' + params.join('&'), img.width = 1, img.height = 1, img.style = 'display:none;';
                document.body.appendChild(img);
                window.setTimeout(function () { var t = document.getElementById('fb_' + imgId); t.parentElement.removeChild(t); }, 1000);
            }
        }
    });
})(window, document);

thanks for share