picture要素で使うsourceタグにもwidthとheight属性を書くといいらしい
突然ですが、picture要素を使ってアスペクト比が違う画像を読み込む場合でも、imgとsourceにwidthとheightを記述すれば、レイアウトシフトが起こらなくなるって知ってました？ <picture> <source srcset="img/img-800x480px.jpg" media="(min-width: 820px)" width="800" height="480"> <img src="img/img-480x480px.jpg" width="480" height="480" alt="画像の説明"> </picture> 実は1年以上前に公開されたChrome 90からサポートされていたそうで（僕はつい先日知りました）、上のコードのようにimgとsourceの両方にwidthとheightを記述すれば、ブラウザがそれらの値を認識して画像ファイルを読み込む前か
A Guide to the Responsive Images Syntax in HTML | CSS-Tricks
This guide is about the HTML syntax for responsive images (and a little bit of CSS for good measure). We’ll go over srcset and , plus a whole bunch of things to consider to help you get the best performance and design control from your images. This guide is about the HTML syntax for responsive images (and a little bit of CSS for good measure). The responsive images syntax is about serving one imag
Responsive Images the Simple Way
Long-time Cloud Four readers will be familiar with Jason’s definitive series on responsive images. This article is meant as a shorter companion piece focused on the most common responsive image use case: resolution switching. The responsive images spec is fantastic and covers a lot of use cases, but in my experience, most of the time you’ll only need to understand one of them: Serving a different
A Complete Guide for Responsive Images!
A responsive image is one whose size responds to changes in screen resolution. The concept of responsive images was triggered by the need to solve issues such as serving different image sizes to different devices, and manifested into using that flexibility for things beyond sizes, such as art direction, image types, and more. The responsive images specification was created only after the responsiv
Planning for Responsive Images | CSS-Tricks
UGURUS offers elite coaching and mentorship for agency owners looking to grow. Start with the free Agency Accelerator today. The first time I made an image responsive, it was as simple as coding these four lines: img { max-width: 100%; height auto; /* default */ } Though that worked for me as a developer, it wasn’t the best for the audience. What happens if the the image in the src attribute is he
State of Responsive Images 2017
To start with, we should acknowledge that we’re in fantastic shape compared to where we were in 2010 when I first wrote about responsive images. The new responsive images standards are available in all current browsers with the exception of Opera Mini. And if your fallback image is optimized for small screens—which it should be—Opera Mini’s lack of support isn’t a problem. I still get questions fr
レスポンシブな3カラム・レイアウトの変形パターンを考える
ウェブサイトで3つのアイテム（製品ラインとか製品の特長とか）をフィーチャーしたい場合、ふつうに3カラムのレイアウトを使いますよね？ですが、いくつかの条件を満たしつつレスポンシブに対応しようとすると結構難しかったりします。 2つでもなく、4つでもなく、どうしても3つのアイテムをフィーチャーしたい。 4カラムだとデスクトップサイズでも各アイテムが小さすぎるし、2カラムだとデカすぎる、みたいな。やっぱり、デスクトップサイズでは3カラムがちょうど良い場合もありますよね。 そんな時どういった対応ができるのか、ちょっと考えてみたいと思います。 レイアウトの条件 たとえば、以下のようなレイアウトの条件があったとします。 どの画面サイズでも表示を隠さない（コンテンツ・パリティ） アイテムの扱いは極力平等にしたい（コンテンツ・プライオリティ） あえて優先順位をつけるなら、左から1、2、3番の順 誘導用のキャ
Leaner Responsive Images With Client Hints — Smashing Magazine
Developers have no reason not to explore Client Hints. The key benefits are more maintainable responsive image tags, fewer image bytes transferred and, ultimately, happier end users. In this article, Jon Arne Sæterås will focus on how to address responsive images issues, with a little help from the web server and Client Hints, the new way for the browser to request images with specific properties.
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Efficient Responsive Images in WordPress | CFX