Why Are My Facebook Social Plugins Not Displaying When Added Dynamically?

Unexpected Absence of Facebook Social Plugin Dynamically Added

When incorporating Facebook social plugins into a web page, a common problem arises when the plugins fail to display after being added dynamically. While manually adding the plugin block:

<div class="fb-comments" data-href="http://website.com/z" data-width="700" data-numposts="7" data-colorscheme="light"></div>

yields the desired results, the same code, when executed dynamically through JavaScript, remains hidden.

The Solution

The Facebook JS SDK, upon initialization, scans the document for elements that resemble social plugins. However, content added posteriormente remains undetected and inaccessible to the SDK. To address this, the FB.XFBML.parse() method must be invoked:

FB.XFBML.parse();

This method instigates another parsing cycle, incorporating the newly added content into the SDK's rendering engine.

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