Title: “Developers” – does not work
Last modified: May 21, 2020

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# “Developers” – does not work

 *  Resolved [eddie](https://wordpress.org/support/users/ediet/)
 * (@ediet)
 * [6 years ago](https://wordpress.org/support/topic/developers-does-not-work/)
 * I enabled “Enable FVM CSS files Preload”, “Enable FVM JS files Preload”. But “
   <link rel=”preload”…” or other not appear. On [https://gtmetrix.com](https://gtmetrix.com)“
   Waterfall Chart” nothing changes.
 * The same problem with sections “Preconnect Headers”, “Preload Headers”.
 * Please deal with the problem.
    -  This topic was modified 6 years ago by [eddie](https://wordpress.org/support/users/ediet/).

Viewing 11 replies - 1 through 11 (of 11 total)

 *  Plugin Author [Raul P.](https://wordpress.org/support/users/alignak/)
 * (@alignak)
 * [6 years ago](https://wordpress.org/support/topic/developers-does-not-work/#post-12869854)
 * Did you repeat the tests a few times and does your server support http push?
 * The intended section for the http headers is for http headers, not for the preload
   link tag. Those are different things. It also only generates after the css and
   js files are created, so you may need to purge the page cache before you start
   seeing the headers.
 * I agree the implementation could be better, but I will improve it in the future.
 *  Thread Starter [eddie](https://wordpress.org/support/users/ediet/)
 * (@ediet)
 * [6 years ago](https://wordpress.org/support/topic/developers-does-not-work/#post-12870328)
 * > Did you repeat the tests a few times and does your server support http push?
 * What mod it is?
 * Several times. I was cleaning the cache.
 * > The intended section for the http headers is for http headers, not for the 
   > preload link tag. Those are different things. It also only generates after 
   > the css and js files are created, so you may need to purge the page cache before
   > you start seeing the headers.
 * I looked http headers by [https://bertal.ru](https://bertal.ru). And timeline
   of scripts/css by [https://gtmetrix.com](https://gtmetrix.com) “Waterfall Chart”.
    -  This reply was modified 6 years ago by [eddie](https://wordpress.org/support/users/ediet/).
    -  This reply was modified 6 years ago by [eddie](https://wordpress.org/support/users/ediet/).
 *  Thread Starter [eddie](https://wordpress.org/support/users/ediet/)
 * (@ediet)
 * [6 years ago](https://wordpress.org/support/topic/developers-does-not-work/#post-12871836)
 * I manually add in code:
 * > <link rel=”preconnect” href=”/wp-content/uploads/cache/fvm/” crossorigin>
 * But its not a good decision.
 *  Thread Starter [eddie](https://wordpress.org/support/users/ediet/)
 * (@ediet)
 * [6 years ago](https://wordpress.org/support/topic/developers-does-not-work/#post-12882782)
 * > Did you repeat the tests a few times and does your server support http push?
 * HTTP/2 enabled.
 * How do I resolve the problem?
 * out/header-XXX.min.js
    out/footer-XXX.min.js have a large loading delay.
 *  Plugin Author [Raul P.](https://wordpress.org/support/users/alignak/)
 * (@alignak)
 * [6 years ago](https://wordpress.org/support/topic/developers-does-not-work/#post-12883131)
 * let me know your site url.
    I’ll take a look.
 *  Thread Starter [eddie](https://wordpress.org/support/users/ediet/)
 * (@ediet)
 * [6 years ago](https://wordpress.org/support/topic/developers-does-not-work/#post-12920359)
 * [https://edieta.org/](https://edieta.org/)
    -  This reply was modified 6 years ago by [eddie](https://wordpress.org/support/users/ediet/).
    -  This reply was modified 6 years ago by [eddie](https://wordpress.org/support/users/ediet/).
 *  Thread Starter [eddie](https://wordpress.org/support/users/ediet/)
 * (@ediet)
 * [5 years, 11 months ago](https://wordpress.org/support/topic/developers-does-not-work/#post-12996203)
 * I gave you the site url 2 weeks ago. Did that help you?
 *  Plugin Author [Raul P.](https://wordpress.org/support/users/alignak/)
 * (@alignak)
 * [5 years, 11 months ago](https://wordpress.org/support/topic/developers-does-not-work/#post-12996392)
 * no time to look yet, sorry.
 *  Thread Starter [eddie](https://wordpress.org/support/users/ediet/)
 * (@ediet)
 * [5 years, 10 months ago](https://wordpress.org/support/topic/developers-does-not-work/#post-13216201)
 * Hello!
    Any time for this?
 *  Plugin Author [Raul P.](https://wordpress.org/support/users/alignak/)
 * (@alignak)
 * [5 years, 10 months ago](https://wordpress.org/support/topic/developers-does-not-work/#post-13216213)
 * It will be available in a few days time. Thanks
 *  Thread Starter [eddie](https://wordpress.org/support/users/ediet/)
 * (@ediet)
 * [5 years, 10 months ago](https://wordpress.org/support/topic/developers-does-not-work/#post-13216421)
 * Thank you!
    And could you make an option to disable FVM in AMP? It’s not needed
   there.

Viewing 11 replies - 1 through 11 (of 11 total)

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 * Last reply from: [eddie](https://wordpress.org/support/users/ediet/)
 * Last activity: [5 years, 10 months ago](https://wordpress.org/support/topic/developers-does-not-work/#post-13216421)
 * Status: resolved