The defer attribute gives a hint to the browser that the script does not create any content so the browser can optionally defer interpreting the script. This can improve performance by delaying execution of scripts until after the body content is parsed and rendered.
This chart represents Javascript Defer web usage trends over a historical time period on a large selection of website homepages queried by BuiltWith. See the FAQ for more information.
We know of 24,372 sites using Javascript Defer, download website list.
The usage trends within the top million sites are updated once per week with the last update occurring on 05 Feb 2012.
For more information about Javascript Defer visit http://www.websiteoptimization.com/speed/tweak/defer/.
Javascript Defer is most likely to be found in use on Shopping, Business or News type websites.
Javascript Defer Top Ten Website Industry Distribution in the Top 100,000 Sites
The chart shows the typical type of websites Javascript Defer can be found on by distribution. We know of 40
categories that Javascript Defer websites can be found on.