AO3: Incomplete. Continue?

Checks how long ago incomplete works were last updated and displays a warning if longer than user set time period.

このスクリプトの質問や評価の投稿はこちら通報はこちらへお寄せください。
// ==UserScript==
// @name        AO3: Incomplete. Continue?
// @version     1.0
// @description Checks how long ago incomplete works were last updated and displays a warning if longer than user set time period.
// @author      sharkcat
// @namespace   https://github.com/sharkcatshark/UserScripts
// @match       https://archiveofourown.org/works/*
// @icon        https://www.google.com/s2/favicons?sz=64&domain=archiveofourown.org
// @license     GNU GPLv3
// ==/UserScript==

// note: months are presumed at 30 days so worst case, warnings are gonna be off by a couple days here and there

// == START Settings ==

const maxTimeAllowed = 6; // months

// == END Settings ==

const chapters = document.querySelector("dd.chapters").innerText;

// if not matching chapter count
if (chapters.match(/\S+(?=\/)/g)[0] != chapters.match(/(?<=\/)\S+/g)[0]) {
    // get dates
    const currentDate = new Date();
    const lastUpdated = new Date(document.querySelector("dd.status").innerText);

    // do maths
    const diffTime = currentDate - lastUpdated;
    const timeSinceUpdateDays = diffTime / (1000 * 60 * 60 * 24);
    const timeSinceUpdateYears = timeSinceUpdateDays / (30 * 12);
    const roundedDays = Math.round(timeSinceUpdateDays);
    const roundedYears = timeSinceUpdateYears.toFixed(2);

    // find date of okay update time
    const updateLimit = currentDate.setDate(currentDate.getDate() - (maxTimeAllowed * 30));

    // see if warning needed
    if (updateLimit > lastUpdated) {
        const message = "This work is currently marked incomplete and was last updated " + roundedDays + " days or " + roundedYears + " years ago. Are you sure you wish to continue?";

        const subject = document.querySelector("#inner");
        subject.insertAdjacentHTML( 'afterbegin', '<div style="border: 2px solid red; background: #ffb5b5; color: black; padding: 10px 30px; max-width: max-content; margin: 0 auto;">'+ message + '</div>' );
    }
}