I am having trouble with my window scroll event not firing at all. None of the other solutions I found have solved the issue

Check out the complete example on JSFiddle!

I am attempting to trigger a JQuery event that will add a class to a div and set an inline style (such as the value for top location offset) when the user scrolls down the page to a specified scrollTop() value (when the number of pixels scrolled down surpasses the viewport height).

Unfortunately, it seems like the JQuery event is not triggering at all.

$(window).bind('scroll', function() {
    ...
});

What I have attempted:

Based on my research from this SO thread, I learned that the element we bind the event to should not be hidden with overflow property. My background image slideshow has position:fixed; so I also tried $("div.firstPage").bind(...) and $("div.header-menu-container-nav").bind(...) but without success.

Note: I understand that the example in the JSFiddle might seem complex. However, it provides complete CSS and markup details, so I decided not to simplify it further.

javascriptjqueryhtmlcss

Answer №1

In certain locations of your code, syntax errors are present due to the incorrect enclosing of class names in quotes.

if (currentPosition >= vph) {
        alert("Condition met!"); //check

        $('.header-menu-container-nav').addClass('sticky');
        --^                       ---^
        $('.header-menu-container-nav').css('top',(deltaMenuPosition)+'px');
        --^                       ---^
        $('.header-menu-container-nav').fadeIn()
        --^                       ---^
    }

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