An Update on CDNJS
When you loaded this blog, a file was delivered to your browser called jquery-3.2.1.min.js. jQuery is a library which makes it easier to build websites, and was at one point included on as many as 74.1% of all websites. A full eighteen million sites include jQuery and other libraries using one of the most popular tools on Earth: CDNJS. Beginning about a month ago Cloudflare began to take a more ac
2019年のWebGLデバッグツール状況 - Qiita
これはThree.js Advent Calendar 2019の14日目の記事です。 3年前に以下の記事を読んでWebGL Inspectorを使い、デバッグ処理でWebGL Inspectorに凄くお世話になりました。 WebGLの開発やデバッグに便利なブラウザ拡張機能をつかってみよう 「Three.jsにBaylon.jsみたいなDebug modeある？」という議論を見つけて気になったので、現状のWebGLデバッグツール状況を調べてみました。 Three.jsフォーラム - Does three.js has some “scene debug mode” or plugin? (like babylon.js DebugLayer) 消失したデバッグツール WebGL Inspector 最終更新日（github）：2017/02/22 去年はまだChromeウェブストアにあった
JSON Parser with JavaScript | Tan Li Hau
Series: AST JavaScriptAST Understand the grammar Implementing the parser Handling the unexpected input Unexpected token Unexpected end of string Going the extra mile Error code and standard error message A better view of what went wrong Suggestions for error recovery Summary The interview question of the week for this week on Cassidoo's weekly newsletter is, Write a function that takes in a string
JavaScriptマルウェアの解析テクニック | IIJ Engineers Blog
Twitterフォロー&条件付きツイートで「バリーくんぬいぐるみ」を抽選で20名にプレゼント！ 応募期間は2019/11/29～2019/12/31まで。詳細はこちらをご覧ください。 今すぐツイートするならこちら→ フォローもお忘れなく！ 【IIJ 2019 TECHアドベントカレンダー 12/8（日）の記事です】 はじめに JavaScriptは、Webページに対して動的な処理を実行するプログラミング言語ですが、近年マルウェアのダウンローダなど悪意ある様々な用途に利用されるケースが多く見受けられます。PE（Portable Executable）のマルウェアに関する解析記事はインターネット上に多く存在しますが、特に日本語で書かれたJavaScriptに焦点を当てた記事はとても少ないのが現状です。そこで本記事では、JavaScriptマルウェアを解析する際に便利なテクニック（暗黙の内に使っ
I created the exact same app in Vue and Svelte. Here are the differences.
Having used Vue at work, I had a fairly solid understanding of it. I had recently heard of Svelte — a new JavaScript framework that had recently started gaining attention amongst the web development scene. As a curious Web Developer, I had been curious to know what the grass was like on the other side of the fence — the grass in this scenario being Svelte. I read the Svelte docs and watched a coup
Cropping Images To A Specific Aspect Ratio With JavaScript
In this 3 minute tutorial we’ll write a tiny JavaScript function that helps us crop images to various aspect ratios. Super useful for cropping photos before posting to social media timelines or uploading profile pictures as these are often required to be of a certain aspect ratio. In this tutorial we’ll by modifying image data. For example, when a user is about to upload a an image we crop it to a
The Front-End Tooling Survey 2019 - Results
Front-end development Blog and Portfolio for Ashley Watson-Nolan – Senior UI Engineer at Just Eat It's been a little while coming, but the results from the 2019 Front-End Tooling Survey are now here! This year, 3,005 developers answered 27 questions covering a wide range of front-end tools and methodologies. As always, a massive thank you from me to every single person that took the time to fill i
Build your own React
We are going to rewrite React from scratch. Step by step. Following the architecture from the real React code but without all the optimizations and non-essential features. If you’ve read any of my previous “build your own React” posts, the difference is that this post is based on React 16.8, so we can now use hooks and drop all the code related to classes. You can find the history with the old blo
Client-Side SQL Query Parsing with ANTLR
Multiple Queries in the Console Query Editor Rockset Console’s query editor allows users to type and run queries over collections. Until now, however, whatever was typed in the editor was run and parsed as a single query. This means that, for a user, it wasn’t that easy to switch between multiple queries in our editor. They would have to comment out the queries they didn’t want to run, or keep all
Hybrid npm packages (ESM and CommonJS)
Warning: This blog post is outdated. It may contain incorrect information. Update 2019-11-22: ESM support in Node.js is not experimental, anymore. This post was updated to reflect that. Conditional exports are now explained. In this blog post, we look at npm packages that contain both ES modules and CommonJS modules. Required knowledge: How ES modules are supported natively on Node.js. You can rea
Build a Dependency Graph Profiler in JS
Breaking our app utilities and UI components into files brings modularity to our project. This helps us keep code organized in separate, reusable files, which improves code maintainability. Each file in the module system exposes its API to the public by using the exports or export keyword. Then, we can reference them by using the require or import keyword. Any file that we import or require become
Top-level await · V8
Top-level await enables developers to use the await keyword outside of async functions. It acts like a big async function causing other modules who import them to wait before they start evaluating their body. The old behavior #When async/await was first introduced, attempting to use an await outside of an async function resulted in a SyntaxError. Many developers utilized immediately-invoked async
Fixing layout instability | Articles | web.dev
[ { "name": "", "entryType": "layout-shift", "startTime": 210.78500000294298, "duration": 0, "value": 0.0001045969445437389, "hadRecentInput": false, "lastInputTime": 0 } ] In this example there was a single very tiny shift of 0.01% at 210ms. Knowing the time and severity of the shift is useful to help narrow down what could have caused the shift. Let's turn back to WebPageTest for a lab environme
I created the exact same app in React and Vue. Here are the differences. [2019 Edition]
Having used Vue at work, I had a fairly solid understanding of it. I had, however, been curious to know what the grass was like on the other side of the fence — the grass in this scenario being React. Note: there is a new version of this article that can be found here: https://sunilsandhu.com/posts/i-created-the-exact-same-app-in-react-and-vue-2020-edition I’d read the React docs and watched a few
![I created the exact same app in React and Vue. Here are the differences. [2019 Edition]](https://cdn-ak-scissors.b.st-hatena.com/image/square/a229f2668ed6825521466698ba6ff56beed1178d/height=288;version=1;width=512/https%3A%2F%2Fmiro.medium.com%2Fv2%2Fresize%3Afit%3A1200%2F1%2AfiKg1ve_EvCP5FIImxXNGQ.png)
Why JavaScript Tooling Sucks
Home Ideas Writing & Speaking About Bio, Talks, Photos Subscribe RSS, Newsletter, Mixtape JavaScript Tooling is just too hard to use, and it’s not your fault. If you clicked on this title ready to agree, you are part of the problem. Don’t worry, so am I. I work on JavaScript Tooling and I think my tools can be a lot better. ”Let he who is without sin” and all that. If you hate-clicked on this titl
Handling API request race conditions in React
Many blog articles talk about loading api/async data in React apps, with componentDidMount, useEffect, Redux, Apollo… Yet, all those articles are generally optimistic, and never mention something important to consider: race conditions could happen, and your UI may end up in an inconsistent state. An image is worth a thousand words: You search for Macron, then change your mind and search for Trump,
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https://www.barbarianmeetscoding.com/blog/2019/12/29/discovering-svelte-adding-some-tasks-and-pomodoros/
Server-Sent Events: A WebSockets alternative ready for another look
Regular expressions in JavaScript: lookaround assertions by example
Vanilla JavaScript and HTML - No frameworks. No libraries. No problem.
