Is there a browser event for the window getting focus?

user_139698 0
Viewed 81746

Is there a way that when I click on my browser, and give it focus, to run a method once? And then when the browser loses focus and then gets the focus back to again run that method only once, again.

jquery javascript
4 Answers
function blinkTab() {
    const browserTitle = document.title;

    const stopBlinking = () => {
        document.title = browserTitle;
    };

    const startBlinking = () => {
        document.title = 'My New Title';
    };

    function registerEvents() {
        window.addEventListener("focus", function(event) { 
            stopBlinking();
        }, false);

        window.addEventListener("blur", function(event) {
            setInterval(() => {
                startBlinking();
            }, 500);

        }, false);
    };

    registerEvents();
};


blinkTab();
user_10769820
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