Forked from DavidKuennen/minimal-analytics-snippet.js
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October 14, 2020 15:38
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Minimal Analytics Snippet
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(function (context, trackingId, options) { | |
const history = context.history; | |
const doc = document; | |
const nav = navigator || {}; | |
const storage = localStorage; | |
const encode = encodeURIComponent; | |
const pushState = history.pushState; | |
const typeException = 'exception'; | |
const generateId = () => Math.random().toString(36); | |
const getId = () => { | |
if (!storage.cid) { | |
storage.cid = generateId() | |
} | |
return storage.cid; | |
}; | |
const serialize = (obj) => { | |
var str = []; | |
for (var p in obj) { | |
if (obj.hasOwnProperty(p)) { | |
if(obj[p] !== undefined) { | |
str.push(encode(p) + "=" + encode(obj[p])); | |
} | |
} | |
} | |
return str.join("&"); | |
}; | |
const track = ( | |
type, | |
eventCategory, | |
eventAction, | |
eventLabel, | |
eventValue, | |
exceptionDescription, | |
exceptionFatal | |
) => { | |
const url = 'https://www.google-analytics.com/collect'; | |
const data = serialize({ | |
v: '1', | |
ds: 'web', | |
aip: options.anonymizeIp ? 1 : undefined, | |
tid: trackingId, | |
cid: getId(), | |
t: type || 'pageview', | |
sd: options.colorDepth && screen.colorDepth ? `${screen.colorDepth}-bits` : undefined, | |
dr: doc.referrer || undefined, | |
dt: doc.title, | |
dl: doc.location.origin + doc.location.pathname + doc.location.search, | |
ul: options.language ? (nav.language || "").toLowerCase() : undefined, | |
de: options.characterSet ? doc.characterSet : undefined, | |
sr: options.screenSize ? `${(context.screen || {}).width}x${(context.screen || {}).height}` : undefined, | |
vp: options.screenSize && context.visualViewport ? `${(context.visualViewport || {}).width}x${(context.visualViewport || {}).height}` : undefined, | |
ec: eventCategory || undefined, | |
ea: eventAction || undefined, | |
el: eventLabel || undefined, | |
ev: eventValue || undefined, | |
exd: exceptionDescription || undefined, | |
exf: typeof exceptionFatal !== 'undefined' && !!exceptionFatal === false ? 0 : undefined, | |
}); | |
if(nav.sendBeacon) { | |
nav.sendBeacon(url, data) | |
} else { | |
var xhr = new XMLHttpRequest(); | |
xhr.open("POST", url, true); | |
xhr.send(data); | |
} | |
}; | |
const trackEvent = (category, action, label, value) => track('event', category, action, label, value); | |
const trackException = (description, fatal) => track(typeException, null, null, null, null, description, fatal); | |
history.pushState = function (state) { | |
if (typeof history.onpushstate == "function") { | |
history.onpushstate({ state: state }); | |
} | |
setTimeout(track, options.delay || 10); | |
return pushState.apply(history, arguments); | |
} | |
track(); | |
context.ma = { | |
trackEvent, | |
trackException | |
} | |
})(window, "XX-XXXXXXXXX-X", { | |
anonymizeIp: true, | |
colorDepth: true, | |
characterSet: true, | |
screenSize: true, | |
language: true | |
}); |
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See https://minimalanalytics.com/ for a minimized version.