2024-01-28のJS: Firefox 122、Deno 1.40、Safari 17.4 Beta
JSer.info #678 - Firefox 122.0がリリースされました。 Firefox 122.0, See All New Features, Updates and Fixes Firefox 122 for developers - Mozilla | MDN <select>の子要素として<hr>を許可するように、CSSのoffset-positionとoffset-pathプロパティをデフォルトで有効化されています。 ArrayBuffer.prototype.transfer()の実装、XSSの対策としてSVGの<use>にData URLを利用できないように変更されています。 また、実験的な機能としてDeclarative shadow DOM、Popover API、Clipboard API、Intl.Segmenterが実装されています。 Deno 1.40
Updates to Storage Policy
A website can store data on a user’s device using various storage APIs: localStorage, IndexedDB, File System, etc. It’s an important capability allowing websites to be functional offline with good performance by serving local resources. However, the storage capacity is not unlimited. In fact, it is usually much smaller than a device’s disk size. Bad things could happen when the capacity is full li
The File System API with Origin Private File System
It is very common for an application to interact with local files. For example, a general workflow is opening a file, making some changes, and saving the file. For web apps, this might be hard to implement. It is possible to simulate the file operations using IndexedDB API, an HTML input element with “file” type, an HTML anchor element with the download attribute, etc, but that would require good
A New Bytecode Format for JavaScriptCore
In revision r237547 we introduced a new bytecode format for JavaScriptCore (JSC). The goals of the new format were to improve memory usage and allow the bytecode to be cached on disk, while the previous format was optimized for interpreter throughput at the cost of memory usage. In this post, we will start with a quick overview of JSC’s bytecode, key aspects of the old bytecode format and the opti
Introducing Storage Access API
Note: Read about improvements to this technology in recent blog posts about Intelligent Tracking Prevention, and the Storage Access API. In June last year we introduced Intelligent Tracking Prevention (ITP). ITP is a privacy feature that detects which domains have the ability to track the user cross-site and either partitions the domain’s cookies or purges its website data all together. The strong
Dynamic import() · V8
Dynamic import() introduces a new function-like form of import that unlocks new capabilities compared to static import. This article compares the two and gives an overview of what’s new. Static import (recap) #Chrome 61 shipped with support for the ES2015 import statement within modules. Consider the following module, located at ./utils.mjs: // Default export export default () => { console.log('Hi
JavaScriptによるMacの自動操作入門の情報まとめ | 大石制作ブログ
大石制作ブログblog.s004.com デザイナー大石真也が 知りたかったこと、見たかったことのメモと、仕事紹介。 自己紹介・サイト説明依頼・価格・お問合せタスク管理パートナーtwitterfacebookatom feed OS Xをスクリプトで行う自動操作は、AppleScriptで制御する場合はそのまま「AppleScript」、JavaScriptの場合は「JavaScript for Automation(以下JXA)」と呼ばれています。ちょっとややこしいけど、慣れるしかないでしょう。 僕は元々AppleScript自体がほとんど分からない状態だったけど、どうやらAppleはOSXのスクリプティングをAppleScriptからJavaScriptに置き換えたいらしいです。 AppleScriptは全然だけど、JavaScriptならチャンスか？ 気が向いたのでJXAを触ってみる
Release Notes for Safari Technology Preview 27
Safari Technology Preview Release 27 is now available for download for macOS Sierra. If you already have Safari Technology Preview installed, you can update from the Mac App Store’s Updates tab. This release covers WebKit revisions 213822-214535. Browser Changes Added a “Reload Page From Origin” alternate menu item to the View menu. This action reloads a page without using cached resources. Remove
Safari web extensions | Apple Developer Documentation
Create web extensions that work in Safari and other browsers.
iOS 8 and iPhone 6 for web developers and designers－firt.dev
next evolution for Safari and native webapps by Maximiliano Firtman Twitter @firt About Newsletter Published 12 years ago (17 Sep 2014) About 14 min reading time #ios #safari #webview iOS 8 is finally here while the new iPhone 6 and iPhone 6 plus will appear in a few days. New APIs appears on scene, as well as new challenges to support the new screen sizes. I’ve been playing with the final version
iOS7 の Safari はゆるふわな HTML に厳しい - oogatta のブログ
こんなゆるふわでファウルな HTML があったとしまして <!DOCTYPE html> <html> <head> <meta charset=utf-8 /> </head> <body> <div id="firstunko"> <p id="unko">unko</p> </div> <div id="secondunko"> <p id="unko">unko</p> <p id="unko">unko</p> <p id="unko">unko</p> <p id="unko">unko</p> <p id="unko">unko</p> </div> </body> </html> これに対して、さらにゆるふわな以下のような JS を走らせますと console.log(document.querySelectorAll('#unko').length); // 6 cons
New Mobile Safari stuff in iOS5: position:fixed, overflow:scroll, new input type support, web workers, ECMAScript 5
(note: this is based on the first iOS5 beta [9A5220p] and is subject to change on final release) It looks like there’s finally some major improvements in mobile Safari, some of which I’ve found below on my “first glance” after downloading the SDK. Chime in if you find anything yourself! Bad news firstMuch to my disappointment, browser-based file uploads are still not supported (input type=“file”),
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Release Notes for Safari Technology Preview 250
News from WWDC26: WebKit in Safari 27 beta
GitHub - koddr/a2hs.js: 📲 A useful modern JavaScript solution that helps your website users to add (install) a progressive web application (PWA) to the Home Screen of their mobile iOS devices.
GitHub - uupaa/WMCache.js: Client side temporary storage to boost performance.
GitHub - mockko/livereload: LiveReload applies CSS/JS changes to Safari or Chrome w/o reloading the page (and autoreloads the page when HTML changes)