How Can I Detect Scrollbar Visibility in HTML Elements Using jQuery?

How to Determine Scrollbar Visibility in HTML Elements

It is often desirable to visually indicate the presence of a scrollbar in a div element, especially when its content may vary in length. This allows users to anticipate the need for scrolling. To address this, jQuery's live hover event can be leveraged to check scrollbar visibility.

Determining Scrollbar Visibility

A custom plugin can be created to ascertain scrollbar visibility. It leverages the scrollHeight and height properties to compare the element's total scrollable height against its visible height. If the former exceeds the latter, a scrollbar is present.

(function($) {
    $.fn.hasScrollBar = function() {
        return this.get(0).scrollHeight > this.height();
    }
})(jQuery);

This plugin can be utilized in practice as follows:

$('#my_div1').hasScrollBar(); // returns true if a vertical scrollbar exists

Considerations

This function can detect vertical scrollbars but may fail when a horizontal scrollbar coexists, leading to the appearance of a vertical scrollbar. In such cases, the clientHeight property can be used instead.

return this.get(0).scrollHeight > this.get(0).clientHeight;

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