background.js

// リクエストを受け取る
chrome.runtime.onMessage.addListener(
    function (values, sender, callback) {
        switch (values.type) {
            case "OpenPage": {
                OpenPage(values, true);
                callback(values.type);
                break;
            }
            case "FindNotification": {
                Notification(values, "あった～");
                callback(values.type);
                break;
            }
            case "NotFindNotification": {
                Notification(values, "なかった～");
                callback(values.type);
                break;
            }
        }

        return true;
    }
);

// ページを開く
function OpenPage(values) {
    chrome.windows.getCurrent(function (window) {
        chrome.tabs.create({
            'windowId': window.windowId,
            'url': "https://hexadrive.jp/hexablog/",
        }, function (tab) {
            SetJavaScript({
                date: values.date,
                tabId: tab.id,
            });
        });
    });
}

// htmlにJavascriptを設定
function SetJavaScript(values) {
    chrome.tabs.executeScript(values.tabId, {
        file: "jquery-3.4.1.min.js"
    }, function () {
        chrome.tabs.executeScript(values.tabId, {
            code: "var values = " + JSON.stringify(values) + ";"
        }, function () {
            chrome.tabs.executeScript(values.tabId, {
                file: "search.js"
            });
        });
    });
}

// 通知
function Notification(values, msg) {
    var tabIdString = values.tabId.toString();
    chrome.notifications.create(tabIdString,
        {
            type: 'basic',
            iconUrl: 'icon128.png',
            priority: 1,
            title: values.date,
            message: msg,
        }, function () {
            chrome.notifications.onClicked.addListener(function (notificationId) {
                if (notificationId == tabIdString) {
                    chrome.tabs.update(values.tabId, { active: true });
                }

                chrome.notifications.clear(tabIdString);
            });
        });
}