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天むすのイラスト
May 8, 2026

Decorating CSS Grid Layout Gaps with `column-rule` and `row-rule`

CSS Gap Decorations introduces `column-rule` and `row-rule` properties that work with flexbox and grid, enabling decorative lines between columns and rows — no more border or background-color workarounds.

#CSS
かわいい鹿のイラスト
May 6, 2026

The sibling-index() CSS Function That Returns a Sibling Element's Index

`sibling-index()` returns an element's index among its siblings. It enables styling based on sibling position, such as staggered animations and gradual hue changes, using only CSS.

#CSS
ハシビロコウのイラスト
May 4, 2026

I Tried iOS App Development Using Codex

I have a background in web development but almost no experience with iOS. I experimented with how far I could get building an iOS app using Codex, an AI coding agent — focusing on learning rather than vibe-coding.

#codex #ios #SwiftUI
ウグイスのイラスト
May 3, 2026

Giving AI Agents Visual Feedback with Playwright CLI

Playwright CLI v0.1.9 added annotations, a useful way to give AI agents visual feedback by selecting browser elements and leaving comments.

#playwright #claude-code
海賊船のイラスト
Apr 28, 2026

Automatic Contrast Adjustment with the `contrast-color()` Function

The `contrast-color()` function returns either `white` or `black`, whichever has a higher contrast ratio against a given color. It helps when colors change dynamically or users apply custom themes.

#CSS #accessibility
ティラミスのイラスト
Apr 26, 2026

What Is A2UI, the Protocol for AI Agents to Safely Generate and Render UI?

Google's A2UI protocol lets AI agents send declarative component definitions instead of executable code, so clients can safely render generated UI with native widgets.

#A2UI #AI
ミルフィーユのイラスト
Apr 24, 2026

Trying json-render, which lets AI generate predefined UIs

Generative UI is gaining attention, but AI output is unpredictable. json-render reduces that risk by making AI generate JSON from a predefined component and action catalog.

#Generative UI #json-render #AI
エッグタルトのイラスト
Apr 21, 2026

Imperatively Notify Assistive Technologies with the `ariaNotify()` Method

The `ariaNotify()` method is a Web API for notifying assistive technologies about dynamic content updates. Unlike traditional WAI-ARIA patterns based on declarative attributes, it lets JavaScript send notifications at the exact timing you intend.

#Web API #accessibility
ワカサギの天ぷらのイラスト
Apr 19, 2026

You Can Now Distribute Agent Skills with the `gh` Command

GitHub CLI now includes the `gh skill` command, making it easier to install, search, and manage agent skills hosted on GitHub. This article walks through how to use `gh skill` in practice.

#github-cli #agent skills
イタドリのイラスト
Apr 16, 2026

apm: A Package Manager for AI Agents

apm is a package manager for AI agents by Microsoft. Like npm or pip, it resolves dependencies while packaging agent skills and MCP as manifests. This article covers the basics of using apm.

#apm #agent skills #MCP
スモークサーモンのイラスト
Apr 11, 2026

Using Claude's Advisor Strategy to Optimize the Balance Between Performance and Cost

The new advisor tool in Claude lets you handle routine tasks with lightweight models while consulting a more capable model only when needed. This article explains how to use the advisor tool in Claude Code.

#claude-code
チェスの駒のイラスト
Apr 10, 2026

About the HTML in Canvas API for Rendering HTML Directly Inside Canvas

HTML in Canvas API is an experimental API proposed at WICG for rendering HTML directly inside a canvas. This article explains how it works, what problems it solves, and the kinds of use cases it enables.

#Web API #canvas
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