Title: Defer parsing of JavaScript with Async JavaScript plugin
Last modified: October 8, 2020

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# Defer parsing of JavaScript with Async JavaScript plugin

 *  [yxda](https://wordpress.org/support/users/yxda/)
 * (@yxda)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/defer-parsing-of-javascript-with-async-javascript-plugin/)
 * Testing the speed of my website I got the suggestion in GTMetrix that ‘Defer 
   parsing JavaScript to reduce blocking of page rendering.’. The grade of my website
   was D (67). I installed and used Async JavaScript plugin, but things have not
   changed. I also use Autoptimize and WP Fastest Cache. Can anyone help me what
   the problem could be? Anything to change in the setting? Thanks.

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/defer-parsing-of-javascript-with-async-javascript-plugin/#post-13510014)
 * well, if you click on that recommendation in GTmetrix it shows what JS is to 
   be deferred, what is listed there?
 *  Thread Starter [yxda](https://wordpress.org/support/users/yxda/)
 * (@yxda)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/defer-parsing-of-javascript-with-async-javascript-plugin/#post-13510259)
 * e.g.
    [https://www.gstatic.com/recaptcha/releases/48TunWH-ZrLteSwFVbw6tVnx/recaptcha__en.js](https://www.gstatic.com/recaptcha/releases/48TunWH-ZrLteSwFVbw6tVnx/recaptcha__en.js)
   also recaptcha and wp-includes/js/jquery/jquery.js?ver=1.12.4-wp
 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/defer-parsing-of-javascript-with-async-javascript-plugin/#post-13510411)
 * afraid the recaptcha ones cannot be deferred (it is a performance killer)
 * re. jquery; you probably excluded it from being asynced and it it likely you 
   needed to, as lots of plugins/ themes require jQuery to be available early ..:-/
 *  Thread Starter [yxda](https://wordpress.org/support/users/yxda/)
 * (@yxda)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/defer-parsing-of-javascript-with-async-javascript-plugin/#post-13510447)
 * Thanks. Now, only the recaptcha seems to remain:
 * [https://www.gstatic.com/recaptcha/releases/48TunWH-ZrLteSwFVbw6tVnx/recaptcha__en.js](https://www.gstatic.com/recaptcha/releases/48TunWH-ZrLteSwFVbw6tVnx/recaptcha__en.js)(
   300.8KiB)
    [https://www.google.com/recaptcha/api2/anchor?ar=1&k=6Levmr8UAAAAALY0tpJ3TP89eOIKTISHB26JyxpO&co=aHR0cHM6Ly90aGV2YWx1ZXRyYWlsLmNvbTo0NDM.&hl=en&v=48TunWH-ZrLteSwFVbw6tVnx&size=invisible&cb=65dnajr4kgdt](https://www.google.com/recaptcha/api2/anchor?ar=1&k=6Levmr8UAAAAALY0tpJ3TP89eOIKTISHB26JyxpO&co=aHR0cHM6Ly90aGV2YWx1ZXRyYWlsLmNvbTo0NDM.&hl=en&v=48TunWH-ZrLteSwFVbw6tVnx&size=invisible&cb=65dnajr4kgdt)

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Defer parsing of JavaScript with Async JavaScript plugin’ is closed to
new replies.

 * ![](https://ps.w.org/async-javascript/assets/icon-128x128.png?rev=1839260)
 * [Async JavaScript](https://wordpress.org/plugins/async-javascript/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/async-javascript/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/async-javascript/)
 * [Active Topics](https://wordpress.org/support/plugin/async-javascript/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/async-javascript/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/async-javascript/reviews/)

 * 4 replies
 * 2 participants
 * Last reply from: [yxda](https://wordpress.org/support/users/yxda/)
 * Last activity: [5 years, 8 months ago](https://wordpress.org/support/topic/defer-parsing-of-javascript-with-async-javascript-plugin/#post-13510447)
 * Status: not resolved