Verify the display of element which disappear immediately in protractor ?

describe('Protractor - Verify the display of element which disappear immediately in protractor', function () {
    beforeAll(async function () {
        await browser.get("https://keeplearners.blogspot.com/2018/03/Angular-elements.html");
    });

    it('Verify the display of element which disappear immediately in protractor', async function () {
        verifyBlinkMessage(2000, 0, "className");
    });

    function verifyBlinkMessage(totalCount, currentCount, className) {
        if (currentCount < totalCount) {
            return browser.executeScript("return document.getElementsByClassName('" + className + "').length").then(function (value) {
                if (value > 0) {
                    console.log("Element displayed=" + value);
                    return browser.executeScript("return document.getElementsByClassName('" + className + "')[0].innerText").then(function (textPopUp) {
                        console.log("pop up message=" + textPopUp);
                        return textPopUp;
                        // return true;
                    });
                } else {
                    console.log("Page is loading....");
                    return verifyBlinkMessage(totalCount, currentCount++, className);
                }
            });
        } else {
            throw new Error("element not present after Max count" + totalCount + "ms reached.")
            // return false; //if element not present after Max count reached.
        }
    }
});

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