Every attribute the tag reads

01The tag's attributes

<script defer data-site="k3xq2mfa7twp" src="https://t.tallybyoutpost.com/script.js"></script>

data-siterequired

The site's id, from its Setup page. DataFast's data-website-id is read the same way.

data-modecookiecookielessconsent

How visitors are counted (Privacy modes). Without it, cookie mode. Any other value counts as cookieless, so a typo never sets cookies the site didn't ask for.

data-apipath or address

Where events go: by default /api/event on the script's own address. A path is resolved against the page, for a proxy on your own domain (Serving it from your domain).

data-hashflag

A change of location.hash alone is a new page, for apps that route after a #.

data-allow-localhostflag

Send events from localhost, 127.0.0.1, *.localhost, *.local and file:// pages (Testing on localhost). DataFast's data-allow-localhost="true" works too.

data-allow-automationflagtests only

Send events from a browser driven by automation (WebDriver, Playwright, Puppeteer). Leave it off on your live site.

deferkeep it

Loads the script without holding up the page.

A flag is on when present, unless its value is false.

02The calls your page can make

// Calls made before the script loads wait in a queue:
window.tally = window.tally || function () { (tally.q = tally.q || []).push(arguments); };

tally('signup', { plan: 'pro' });   // a goal, with properties
tally('identify', { email: user.email });   // match payments by email
tally('consent', true);   // consent mode: the banner said yes
tally('consent', false);  // ...or no

Each call fails quietly: it never throws into your page. window.datafast(…) is the same function. Goals and identify has the rules for names.

03Examples

<script defer data-site="k3xq2mfa7twp" data-mode="consent" src="https://t.tallybyoutpost.com/script.js"></script>

<script defer data-site="k3xq2mfa7twp" data-hash src="https://t.tallybyoutpost.com/script.js"></script>

<script defer data-site="k3xq2mfa7twp" src="/js/script.js"></script>

<script defer data-site="k3xq2mfa7twp" data-allow-localhost src="https://t.tallybyoutpost.com/script.js"></script>

04What it sends

Each is one small JSON request, sent without cookies; anything over 8 KB isn't sent. A page opened in the background by prerendering counts once someone actually opens it.

05When it sends nothing

• There's no data-site, or no address to send to (a copy of the script pasted inline without data-api).
• The page is on localhost without data-allow-localhost, or the browser is automated without data-allow-automation.
• The browser has opted out with localStorage.datafast_ignore = true.

Your page's calls still work then: they do nothing.

06What it doesn't read