https://www.nougatdiane.com/modules/pixel_plausible/views/js/goals.js

1/* Works with default theme. Override in your own theme to adapt and extend. */
2const plausibleGoals = {
3    /* Default goal, send event with optional params */
4    run: function(event, params) {
5        plausible(event, params);
6    },
7
8    /* Checkout goal, allows to send the current step */
9    checkout: function(event, params) {
10        current();
11
12        const continueButtons = document.getElementsByClassName('continue');
13        for (let i = 0; i < continueButtons.length; i++) {
14            continueButtons[i].addEventListener('click', function () {
15                current();
16            });
17        }
18
19        function current() {
20            const steps = document.getElementsByClassName('checkout-step');
21            for (let i = 0; i < steps.length; i++) {
22                if (steps[i].classList.contains('-current')) {
23                    plausible(event + '-' + (i + 1), params);
24                }
25            }
26        }
27    },
28}