ブラウザレンダリングの仕組み
フロントエンド用語を100秒で解説するチャンネルを作りました！ よかったらチェックしてみてください！ はじめに 以前書いた記事「Webページがブラウザに表示されるまでに何が起こるのか？」で ブラウザレンダリングについて詳細に知りたいという意見をいただいたので、調べてまとめてみました。 全体図 レンダリングの大まかな流れです。 HTMLのダウンロード サーバから送られてきたHTMLをダウンロードします。 HTMLの解析 サーバから送られてきたHTMLファイルは、「0」と「1」でできたデータになっています。 ブラウザは、サーバから受け取ったデータをそのままHTMLとして解釈することはできないので、自分で扱うことができる形、つまりDOMに変換する必要があります。この作業を 解析 ( Parse ) と言います。 HTMLをダウンロードしたら、すぐにこの解析作業に入ります。作業は以下のようなステッ
Inside look at modern web browser (part 1) | Blog | Chrome for Developers
CPU, GPU, Memory, and multi-process architecture In this 4-part blog series, we'll look inside the Chrome browser from high-level architecture to the specifics of the rendering pipeline. If you ever wondered how the browser turns your code into a functional website, or you are unsure why a specific technique is suggested for performance improvements, this series is for you. As part 1 of this serie
Optimising the front end for the browser | HackerNoon
Too Long; Didn't ReadIf you looked up optimisation (or optimization for our American readers) in the dictionary it would say something along the lines of <em>Making the most of what we’ve got</em>. If you looked up optimisation (or optimization for our American readers) in the dictionary it would say something along the lines of Making the most of what we’ve got. A worthy endeavour and challenge a
Understanding the Critical Rendering Path | bitsofcode
When a browser receives the HTML response for a page from the server, there are a lot of steps to be taken before pixels are drawn on the screen. This sequence the browsers needs to run through for the initial paint of the page is called the "Critical Rendering Path". Knowledge of the CRP is incredibly useful for understanding how a site's performance can be improved. There are 6 stages to the CRP
GitHub - alex/what-happens-when: An attempt to answer the age old interview question "What happens when you type google.com into your browser and press enter?"
To pick a zero point, let's choose the Enter key on the keyboard hitting the bottom of its range. At this point, an electrical circuit specific to the enter key is closed (either directly or capacitively). This allows a small amount of current to flow into the logic circuitry of the keyboard, which scans the state of each key switch, debounces the electrical noise of the rapid intermittent closure
How browsers work
Introduction Web browsers are probably the most widely used software. In this book I will explain how they work behind the scenes. We will see what happens when you type 'google.com' in the address bar until you see the Google page on the browser screen. The browsers we will talk about There are five major browsers used today - Internet Explorer, Firefox, Safari, Chrome and Opera. I will give exam
Improve Browser Performance With the CSS Stress Test Tool — SitePoint
April 27, 2011Improve Browser Performance With the CSS Stress Test Tool CSS3 backgrounds, rounded corners, box shadows, text shadows, opacity and transformations save web developers hours of time. Basic effects can be achieved without resorting to image slicing, additional elements or scripting. Despite this, not all is rosy in the CSS3 world. When I first dabbled with the techniques a couple of y
Optimizing the Critical Rendering Path — SitePoint
October 16, 2014Optimizing the Critical Rendering Path Web pages are getting bigger and bigger in terms of consumed bandwidth and loaded assets (CSS, JS, images, fonts). The share of users who surf the web with mobile phones and tablets is increasing. Sure, at home you have your desktop computer with a really fast internet connection. Yet, a lot of people out there probably don’t visit your site w
Learn web development | web.dev
Stay organized with collections Save and categorize content based on your preferences. Explore our growing collection of courses on key web design and development subjects. An industry expert has written each course, helped by members of the Chrome team. Follow the modules sequentially, or dip into the topics you most want to learn about.
How to create high-performance CSS animations | Articles | web.dev
Move an element To move an element, use the translate or rotation keyword values of the transform property. For example, to slide an item into view, use translate. .animate { animation: slide-in 0.7s both; } @keyframes slide-in { 0% { transform: translateY(-1000px); } 100% { transform: translateY(0); } } Use rotate to rotate elements. The following example rotates an element 360 degrees. .animate
The Pursuit of 60fps Everywhere with Nat Duca
Nat Duca is an engineer on the Chrome team working to make an always-60fps, jank free mobile web a reality. If you want to move something at 60fps today, you must apply a littany of tricks, especially translateZ and friends. If you make a mistake, off the fast path ye shall go. On the Chrome team we think this sucks. Throughout the last year, we've been digging through examples of mobile UIs buil
Let's build a browser engine! Part 1: Getting started
I’m building a toy HTML rendering engine, and I think you should too. This is the first in a series of articles: Part 1: Getting started Part 2: HTML Part 3: CSS Part 4: Style Part 5: Boxes Part 6: Block layout Part 7: Painting 101 The full series will describe the code I’ve written, and show how you can make your own. But first, let me explain why. You’re building a what? Let’s talk terminology.
Jank Free: Let's Make the Web Silky Smooth!
What is Jank? Modern browsers try to refresh the content on screen in sync with a device's refresh rate. For most devices today, the screen will refresh 60 times a second, or 60Hz. If there is some motion on screen (such as scrolling, transitions, or animations) a browser should create 60 frames per second to match the refresh rate. Jank is any stuttering, juddering or just plain halting that user
WebPagetest - Website Performance and Optimization Test
Test. Experiment. Improve! WebPageTest. The gold standard in web performance testing. Lightning-Fast Web Performance Online CourseLearn to analyze performance, fix issues, and deliver fast websites from the start. Free! Start Course Now >> Introducing Carbon Control Experimental New in WebPageTest! Measure your site's carbon footprint and run No-Code Experiments to find ways to improve.
CSS Triggers List - What Kind of Changes You Can Make
• Layout • Paint • Composite align-content Changing align-content alters the geometry of the element. That means that it may affect the position or size of other elements on the page, both of which require the browser to perform layout operations. Once those layout operations have completed any damaged pixels will need to be painted and the page must then be composited together. align-items Changi
Google core web vitals - Full Service Internet Marketing Company & Internet Marketing Tools
There are lots of companies that are selling Core Web Vitals reports and analysis. These reports often will point out the same issues, with different wording, telling you everything you need to fix. You can also use some of Google’s free tools like Google’s PageSpeed Insights tool, or, better yet, Google Lighthouse to check your scores and to check for any issues that are slowing your site down, o
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Effective web performance tuning for smartphone
CSS and the Critical Path - CSSConfEU September 2014
Velocity 2014: GPU and Web UI Performance: Building an Endless 60fps Scroller