pirsch.js

(function() {
    "use strict";

    if(navigator.doNotTrack === "1" || localStorage.getItem("disable_pirsch")) {
        return;
    }

    const script = document.querySelector("#pirschjs");
    const endpoint = script.getAttribute("data-endpoint") || "https://api.pirsch.io/hit";
    const identificationCode = script.getAttribute("data-code");
    const dev = script.getAttribute("data-dev");

    if(!dev && (/^localhost(.*)$|^127(\.[0-9]{1,3}){3}$/is.test(location.hostname) || location.protocol === "file:")) {
        console.warn("You're running Pirsch on localhost. Hits will be ignored.");
        return;
    }

    function hit() {
        const url = endpoint+
            "?nc="+new Date().getTime()+
            "&code="+identificationCode+
            "&url="+encodeURIComponent(location.href.substr(0, 1800))+
            "&t="+encodeURIComponent(document.title)+
            "&ref="+encodeURIComponent(document.referrer)+
            "&w="+screen.width+
            "&h="+screen.height;
        const req = new XMLHttpRequest();
        req.open("GET", url);
        req.send();
    }

    if(history.pushState) {
        const pushState = history["pushState"];

        history.pushState = function() {
            pushState.apply(this, arguments);
            hit();
        }

        window.addEventListener("popstate", hit);
    }

    if(!document.body) {
        window.addEventListener("DOMContentLoaded", hit);
    } else {
        hit();
    }
})();