errlog parser.js

[ ...document.querySelectorAll("tbody tr") ]
    .filter(tr => tr.querySelector("td[data-text]")?.attributes["data-text"].value.includes("404"))
    .map(tr => {
        const td = tr.querySelector("[data-text]");
        const ts = tr.querySelector("td:nth-child(2)");

        const { value } = td.attributes["data-text"];
    
        const url = value.match(/url: (.*?)[;}]/)[1];
        const referer = value.match(/referer: (.*?)[;}]/);
        const ip = value.match(/ip: (.*?)[;}]/);

        return [ts.innerText.split(" ")[0], url, referer && referer[1], ip && ip[1]].join(",");
    });