![]() In general, this message tells you the goal for tuning performance. #Forced reflow while executing javascript code#In order to understand how and when browsers decide to redraw something, what repaint and reflow are, I recommend reading this article. (index):35 Violation 'mouseover' handler took 273ms 11:23:10.318 Violation Forced reflow while executing JavaScript took 271ms 11:23:10.628. Violation Forced reflow while executing JavaScript took 31ms code example Update: Chrome 58+ hid these and other debug messages by default. By the way, this is not necessarily bad, it can be difficult to refuse. In this particular case, Vorning tells you that something has happened on js that caused a significant restructuring of the page without a clear reason for the debugger and tells how much it took. In the hard case this is the so-called layout thrasing. So, one of the killers of performance in js is careless manipulation of the DOM, because you can cause a redrawing of what you do not need to redraw. This is usually the code that solves the problem, but you can make it much more optimal. The "Verbose" level in the console makes it easier to find performance bottlenecks, in other words, why everything is so tupit. You can read more about the asynchronous nature of JavaScript here.This is a warning, deliverance or non-refusal from which is on your conscience. Consider marking event handler as passive to make the page more responsive. Looked at the Apache error logs, access logs and the Magento2 exception system and debug logs. Violation Forced reflow while executing JavaScript took ms sorry forgot to add them loading Step 1: Violation Forced reflow while executing JavaScript took 93ms 5Violation Added non-passive event listener to a scroll-blocking event. As you can see the tables are opened and it does not take the values I give it, I look at the console and I get that error.Promise.resolve().then(functionToRunVerySoonButNotNow) Violation Forced reflow while executing JavaScript took 107ms Violation Forced reflow while executing JavaScript took 46ms Violation Forced reflow while executing JavaScript took 38ms 4. Violation Long running JavaScript task took 234 ms Violation Forced reflow while executing JavaScript took 45 ms. This one is not available natively in IE, but there are polyfills available. Violation Forced reflow while executing JavaScript took 45ms. If needed, it should always be possible to do (3). (1) and (2) may be difficult or impossible, but it's sometimes really easy and should be your first attempts. #Forced reflow while executing javascript how to#Once you've found some code that's taking a long time (50ms is Chrome's threshold), you have a couple of options:Ĭut out some/all of that task that may be unnecessaryįigure out how to do the same task fasterÄivide the code into multiple asynchronous steps Hi folks,I get this error message Violation Forced reflow while executing JavaScript took 30ms in developer console, when clicking on Subscribe button. If you want to get more advanced, you could also use Chrome's profiler, or make use of a benchmarking library like this one. ![]()
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