How to Retrieve CSS Values from External Style Sheets for Dynamically Generated Elements?

Retrieving CSS Values from External Style Sheets with Javascript/jQuery

While the jQuery method $('element').css('property') is a convenient way to retrieve style information, it requires the presence of the element on the page. For elements that are generated dynamically and thus not yet present, a different approach is necessary.

Leveraging Hidden Elements

One strategy is to temporarily add a hidden copy of the element to the page. By accessing this hidden element's style, you can retrieve the desired CSS value. This method can be implemented using the following code:

(function() {
    var $p = $("<p></p>").hide().appendTo("body");
    console.log($p.css("color"));
    $p.remove();
})();

However, this approach introduces unnecessary DOM manipulation, potentially affecting page performance.

Alternative Approach with jQuery

An alternative solution leverages jQuery's $.getStyle() function, which allows you to access a style property's value directly from a selector string or an element object without rendering it on the page:

$.getStyle("p", "color");

This method provides a cleaner and more efficient way to retrieve CSS values for dynamically generated elements.

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