Original article: Minimizing browser reflow by Lindsey Simon, UX Developer, posted on developers.google.com. It's a Vue2 and unfortunately also Vue3thing. A solution approach. My function, which is formate tooltip text is very simple and no other action with Dom produced. @AndrewEastwood yup it did, actually you can see how it works on prod here. effects of various document properties (DOM depth, CSS rule What do you need to do to trigger that error on the page? set $MOBILE m_; This is a warning, deliverance or non-elimination from which is on your conscience. In which browser did the problem occur. I wrote about the Critical Rendering Path (CRP) in a former article. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. it with one of them i will appreciate this , no, its not CE either, its your sites original JS. particular - which require more CPU power to do selector matching. Find centralized, trusted content and collaborate around the technologies you use most. the performance. this usually this script: . Thank you again if you will continue to help or not. if ($http_cache_control ~* private) { A quick test on Chrome, we don't get the warning message ([Violation] Forced reflow while executing JavaScript took xxms). this is why i'm so frustrating about it. So, one of the performance killers in js is sloppy DOM manipulation, because you can cause redrawing of what you don't need to redraw. reflowing its parent elements and also any elements which follow it. There's a good chance that you are reading advice that it now obsolete. [Closed] [Violation] Forced reflow while executing JavaScript took 34ms This support ticket is created 2 years, 3 months ago. You just need to avoid a DOM measurement after a DOM mutation in the same CRP. Nadav Levi Yahel and is common performance bottleneck. A more robust solution would be to defer the measurement to a future CRP. Similarly, directly applying CSS styles or changing the class may alter the layout. if ($request_uri ~* (/administrator|com_user|com_users|com_contact|com_mailto|/component/user|/component/users|/component/contact|/component/mailto|/installation|/wp-admin|/wp-login.php|/cart|/my-account|/checkout|/wc-api|/addons|/lost-password|\?add-to-cart=|\?wc-api=|/ucp.php|^/status\.php|^/update\.php|^/install\.php|^/apc\.php$|^/apcu\.php$|^/admin|^/admin/.*$|^/user|^/user/.*$|^/users/.*$|^/info/.*$|^/flag/.*$|^.*/ajax/.*$|^.*/ahah/.*$|^/system/files/. } Anyway, I decided to make a separate topic as this is a different issue now than my original post from here: There has to be some kind of standard that Google is applying, but is that standard publicly documented anywhere? cursor = conn.cursor () # get mysql db-api cursor. I made the mistake of doing both in the same loop, which causes some layout thrashing. @jlmakes, thanks for your response, I think I'll try to upgrade it this weekend. if ($request_uri ~* (/administrator|/wp-admin|/wp-login.php)) { Network requests will be delayed until a previous loading finishes, or the tab is brought to the foreground. Everything was fine until I updated the "state" that forces the "results component" to rerender. I think you are mistaken in your answers. Chrome shows debug information if it thinks a script is taking too long to execute a particular handler. It explains what browser reflow is: Reflow is the name of the web browser process for re-calculating the This permits the dimensions and position to be modified without affecting other elements in the document. set $CACHE_BYPASS_FOR_DYNAMIC 1; The text was updated successfully, but these errors were encountered: ScrollReveal relies on getComputedStyle() and editing style attributes (modifying the DOM), both of which cause style and layout. My slider values are controlled via React states. to the plugin, dont have mime type. they have a good plugin but they all the time do pointless updates and destroy }, # Invision Power Board (IPB) v4+ Not the answer you're looking for? i used your second idea to track the changes. Reduce unnecessary DOM depth. Should I include the MIT licence of a library which I use from a CDN? It has severe performance implications and should be avoided as much as possible. For more detailed help you need to post your code, preferably as an executable example. Get an all-access pass to premium plugins, offers, and more! and all the cache together will show the real execution time of jquery (deprecated). 100ms (1/10th of a second). Ok, but as I write above, messages appear also when I'm only point mouse over slider handle. In a severe case, this is the so-called layout thrasing . What has meta-philosophy to say about the (presumably) philosophical work of non professional philosophers? the second is gclid. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. To display them click the arrow next to 'Info' and select 'Verbose'. How can I change an element's class with JavaScript? Projective representations of the Lorentz group can't occur in QFT! Minimize CSS rules, and remove unused CSS rules. Thanks for contributing an answer to Stack Overflow! 2 Ways to Use Your Own Docker Image in Github Actions. NOW I ASSURE YOU, YOU WRONG AND I NEED HELP EMERGENCY THIS ERROR ON ALL MY SITE AND THIS START TO BE THE SAME ERROR DOUBLE x20 FROM THE LAST UPDATE OF CACHE ENABLER. proxy_no_cache $CACHE_BYPASS_FOR_DYNAMIC; If practical, make changes to the element before making it visible. Great, you've narrowed down the possibilities! It won't let me post the screenshot of the error here, but what the console (google chrome dev tools) says is : " [Violation] Forced reflow while executing Javascript took 53ms". set $EXPIRES_FOR_DYNAMIC 0; (If it is yours, then you have found the source of your problem.). Lets assume you wanted to create this bullet list: Adding each element one at a time causes up to seven reflows one when the