Violentmonkey(GreaseMonkey) script for showing if the day has been mended on Jobcan.

script.js

// ==UserScript==
// @name        script - jobcan.jp
// @namespace   Violentmonkey Scripts
// @match       https://ssl.jobcan.jp/employee/attendance*
// @grant
// @version     1.0
// @author      Nick
// @description 8/28/2023, 1:40:55 PM
// ==/UserScript==

var url = document.URL;
(async function() {
  'use strict';

  const days = [...document.querySelectorAll('#search-result tr.jbc-table-danger')]
      .map(tr => [...tr.querySelectorAll('td')])
      .filter(tds => tds.length > 1);
  
  for(let idx in days) {
    const tr = days[idx];
    const td = tr[0].querySelector("a");
    if (!td) { continue; }
    const link = tr[0].querySelector("a").href;

    const dayPage = await fetch(link, {
      headers: {
          "accept": "text/html",
          "accept-language": "ja,en-US;q=0.9",
          "cache-control": "max-age=0",
          "upgrade-insecure-requests": "1"
      },
      referrer: "https://id.jobcan.jp/",
      referrerPolicy: "strict-origin-when-cross-origin",
      method: "GET",
      mode: "cors",
      credentials: "include"
    });
    const dayPageContent = await dayPage.text();
    const dayStatus = handleResponse(dayPageContent);

    tr[8].innerHTML = dayStatus;
  }

  function handleResponse(responseText) {
    let parser = new DOMParser();
    let doc = parser.parseFromString(responseText, "text/html");

    const types = [...doc.querySelectorAll('#logs-table tr')]
      .map(tr => [...tr.querySelectorAll('td')])
      .filter(tds => tds.length > 0)
      .map(([td0]) => td0.textContent.trim());
    return types.join(",")
  }

})();