As explained in another article, the Convertize pixel is synchronous to avoid a flickering effect when loading the web page.
However, Convertize does allow the user to change the pixel from synchronous to asynchronous.
Loading the pixel asynchronously
To allow the page to load at the same time as the Convertize pixel, you must add the attribute “async” in the pixel between “
.js” and “
></script>” leaving a white space before “async” as shown below in “Example #2: asynchronous pixel”.
Loading the pixel after the page has loaded
Sometimes you may need to wait for the complete page to load before fetching the Convertize pixel. Both the original code and the asynchronous method mentioned previously will hide the page content as soon as the pixel is retrieved to apply your experiments, then show the content when the page is fully loaded.
However, please note with this method the user is likely to see the original content briefly before the scenario is applied.
Example #1: synchronous pixel (given by Convertize)
<script src="//pixel.convertize.io/1177.js" charset="UTF-8"></script>
Example #2: asynchronous pixel (modified by the user)
Example #3: long version asynchronous pixel (modified by the user)
The first browser versions that fully support the attribute are Firefox 3.6, Internet Explorer 10.0, and all versions of Google Chrome, Safari, and Opera.