Remove css-containment
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Helping Browsers Optimize With The CSS Contain Property

CSS - Tricks

The will-change property in CSS is sometimes needed for more performant animation. Now we have CSS contain , the point of which is to tell the browser about your layout so it can do things faster. If you want any offline capability at all, or exotic performance improvements, you have to write custom service workers code.

Design 117
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Speeding Up Async Snippets

CSS Wizardry

For all the resulting script is asynchronous , the block that creates it is fully synchronous , which means that the discovery of the script is governed by any and all synchronous work that happens before it, whether that’s other synchronous JS, HTML, or even CSS. The Preload Scanner. For the simplest case, for example: var script = document.

Speed 301
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The Fastest Google Fonts

CSS Wizardry

So, I cloned the CSS wizardry homepage a bunch of times and implemented the various different methods there. Async CSS: Loading the Google Fonts File asynchronously. preload : preload ing the CSS file to increase its priority. Async CSS: Loading the Google Fonts File asynchronously. Results (s) – CSS Wizardry: FP.

Google 364
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Optimising Largest Contentful Paint

CSS Wizardry

An element with a background image loaded via the url() function (as opposed to a CSS gradient ). elements containing text nodes or other inline-level text elements children. Resources defined in CSS (chiefly anything requested via the url(). Block-level. function ) are slow by default. Don’t Shoot Yourself in the Foot.

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A Deep Dive Into `object-fit` And `background-size` In CSS

Smashing Magazine

A Deep Dive Into `object-fit` And `background-size` In CSS. A Deep Dive Into `object-fit` And `background-size` In CSS. An image will have an aspect ratio, and the browser will fill the containing box with that image. CSS object-fit. On design systems, CSS/JS and UX. object-fit: contain. Ahmad Shadeed.

C++ 142
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The Ultimate Low-Quality Image Placeholder Technique

CSS Wizardry

The median image-weight per page landed at 881KB in 2022 , which is more than HTML, CSS, JS, and fonts combined! It’s CSS pixels all the way down. In order for an image to be counted as an LCP candidate, it needs to contain at least 0.05 At the time of writing, 99.9% of pages on the web include at least one image.

Games 275
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CSS Container Queries: Use-Cases And Migration Strategies

Smashing Magazine

CSS Container Queries: Use-Cases And Migration Strategies. CSS Container Queries: Use-Cases And Migration Strategies. Whereas page layout is an element closely tied to viewport dimensions and is one of the topmost elements in HTML, UI components can be used in different contexts and containers. Adrian Bece.

Strategy 126