bookmarklet to refresh Gmail POP3 accounts

refresh-gmail.js

javascript:
(function () {
    const gmailWindow = window;
    if(gmailWindow.location.href.indexOf("https://mail.google.com/") === -1){
        alert('You have to run the bookmarklet from a Gmail window');
        return;
    }
    gmailWindow.location.assign('https://mail.google.com/mail/u/0/#settings/accounts');
    const xpath = "//span[text()='Check mail now']";

    const refreshAccounts = () => {
        const selectedNodeElements = gmailWindow.document.evaluate(xpath, gmailWindow.document, null, XPathResult.ANY_TYPE, null);
        let currentNode = selectedNodeElements.iterateNext();
        if (currentNode === null) {
            setTimeout(refreshAccounts, 100);
        } else {
            while (currentNode) {
                currentNode.click();
                currentNode = selectedNodeElements.iterateNext();
            };
            gmailWindow.location.assign('https://mail.google.com/mail/u/0/#inbox');
        };
    };
    setTimeout(refreshAccounts, 100);
})();

Perfect!

Thank you so much!

BTW, in FF, I pasted the formatted (raw) code into the URL box and it worked fine (e.g. no need to reformat).