tags flash 
CSS - Tricks
JULY 30, 2019
. <link rel="stylesheet" href="/path/to/my.css" media="print" onload="this.media='all'"> Don't just up and do this to all your stylesheets though, otherwise, you'll get a pretty nasty "Flash of Unstyled Content" ( FOUC ) as the page loads. You need to pair the technique with a way to ship critical CSS.
Smashing Magazine
JUNE 9, 2022
Before frontend applications became as complex as they are today, all JavaScript was used for was to add basic interactivity to otherwise simple HTML documents — similar to the way Adobe’s Flash was used. There are two major ways to load JavaScript in the browser.
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KeyCDN
AUGUST 29, 2019
Instead, we take the following code and we move it down to our footer, right before the tag. Note: Doing this will result in FOUT, which is a flash of unstyled text. We then include our Google Font with the following code in our footer, right before the tag. Google Fonts The third issue is with our Google Fonts.
Smashing Magazine
SEPTEMBER 23, 2021
Alternatively we could implement it using a meta tag in our HTML: <meta name="color-scheme" content="light dark"> This is actually preferable, as it will be read by the browser immediately before the CSS file is parsed and executed — therefore could help us avoid a flash of unstyled content (FOUC).
Smashing Magazine
OCTOBER 18, 2021
Web-fonts: We have noticed that late loading of fonts causes user frustrations since the content flashes and it also causes some amount of layout shifts. It is built on top of <img> HTML tag and can help to improve LCP and CLS. We preload the fonts. This component incorporates several image-related best practices.
Smashing Magazine
APRIL 29, 2021
This is an empty element — it has no closing tag — requiring a minimum of one attribute to be helpful: src , the source. The background-image CSS property allows us to set background images on an element, including the <img> tag or any parent container elements. The Basics. Large preview ).
Speed Curve
NOVEMBER 11, 2015
Here's sample code for capturing this custom metric: performance.mark("stylesheets done blocking"); The key to this snippet is making sure that it's placed below all the stylesheet LINK tags in the page. Therefore, placing the inline script after the LINK tags ensures that the mark is set after all the blocking CSS has been processed.
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