Cool Bits
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React, Visualized is a micro-site we created with a bunch of visualizations for major React concepts. Yes, we spent way too much time on it, but it helps keep the demons away.
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beeps just launched an on-call platform for Next.js applications that pings “beeps” you in Slack whenever there’s an incident in your app. It shows you all the contributing factors and tells you if it’s your code’s fault or a problem with one of your external services like Clerk or OpenAI. [sponsored]
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Addy Osmani used Transformers.js to build a free background image remover, which will save you from those monsters who upload fake PNG images that aren’t actually transparent.
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Phil Hagelberg wants to remind you that Douglas Crockford is not your dad, which means two very important things: 1) you can put comments in your JSON files, and 2) you should probably stop sending him postcards asking him if he’ll come back home once the Angels win the pennant.
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Matan Borenkraout wrote about a tasty little React anti-pattern to help you spice up the holidays.
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Rohan Bhaumik and Lindsay Piper are hosting a free livestream on how to keep flaky tests from clogging up your CI. They’ll cover why flaky tests happen and how to handle them effectively – without hitting “rerun” every 5 minutes. [sponsored]
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bolt.diy is a new, open-source version of bolt.new that lets you choose the LLM you use for each prompt.
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Safari 18.2 claims to be “the biggest release of new features this year” for web developers. I’m pretty sure the PM in charge of the new Apple Photos disaster redesign said the same thing, so let’s pray it’s better than that.
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Million Autopilot is a new VSCode extension for “fixing” slow React renders.
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CarbonQA provides high-quality QA services that scale. Their US-based testers will break your app repeatedly and do all the manual testing you hate doing yourself. [sponsored]
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State of Node.js performance 2024 analyzes all the new versions of Node that came out this year to look at how the runtime evolved in 2024.
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Holger Dal Mogensen created Svader, a library for creating GPU-rendered Svelte components with WebGL and WebGPU fragment shaders. I’m 80% sure Svader is also the name of a character in Rocket Power who specializes in kick flips and pranking shoobies.
Pop Quiz: Answer
Sponsored by Infinite Red
What gets logged to the console?
const res = ["👨", "", "👩", "", "👧", "", "👦"].join('')
console.log(res) // 👨👩👧👦
It’s the ”👨👩👧👦” emoji.
This works because the Unicode standard supports mapping individual emojis with zero-width joiners to create new emojis. In our case, taking individual emojis and joining them to get a family emoji. Wow, programming.
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酷点
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React, Visualized 是我们为主要 React 创建的一个微型网站，其中包含大量可视化内容概念。是的，我们在这上面花了太多时间，但它有助于驱除恶魔。
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beeps 刚刚推出了一个 Next.js 应用程序的待命平台，只要您的系统发生事件，它就会在 Slack 中向您发出“嘟嘟声” 应用程序。它会向您显示所有影响因素，并告诉您这是代码的错误还是 Clerk 或 OpenAI 等外部服务之一的问题。 [赞助]
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Addy Osmani 使用 Transformers.js 构建了一个免费背景图像删除器，这将使您免受那些上传假 PNG 的怪物的侵害实际上不透明的图像。
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Phil Hagelberg 想提醒您[道格拉斯·克罗克福德 (Douglas Crockford) 不是您的爸爸](https://click.convertkit-mail4.com/wvu9xd93o4sghk93rmvslun38mkxxa8/9qhzhdupe 2vv6oh9/aHR0chHM6Ly9kb3VnbGFzY3JvY2tmb3JkaXNub3R5b3VyZGFkLnRlY2hub21hbmN5LnVzLw==),这意味着两件非常重要的事情：1）你可以在 JSON 文件中添加注释，2）你应该停止向他发送明信片询问他一旦天使队赢得锦旗是否会回家。
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Matan Borenkraout 写了一篇关于 [一个美味的小 React反模式](https://click.convertkit-mail4.com/wvu9xd93o4sghk93rmvslun38mkxxa8/3ohphdu7kd552phr /aHR0chHM6Ly9tYXRhbmJvYmkuZGV2L3Bvc3RzL3N0b3AtcGFzc2luZy1zZXR0ZXItZnVuY3Rpb25zLXRvLWNvbXBvbmVudHM=)帮助您为假期增添情趣。
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Rohan Bhaumik 和 Lindsay Piper 正在举办免费直播，内容是 [如何防止片状测试堵塞你的CI](https://click.convertkit-mail4.com/wvu9xd93o4sghk93rmvslun38mkxxa8/48hvh7ur7 2ddp3ax/aHR0chHM6Ly9zZW50cnkuaW8vcmVzb3VyY2VzL2ZsYWt5LXRlc3Qtd29ya3Nob3AvP3V0bV9jY W1wYWlnbj1jb2RlY292LWZ5MjVxNC10ZXN0YW5hbHl0aWNzJnV0bV9jb250ZW50PXN0YXRpYy1hZC1mb GFrXdvcmtzaG9wLXJzdnAmdXRtX21lZGl1bT1wYWlkLWNvbW11bml0eSZ1dG1fc291cmNlPWJ5dGVz）。他们将介绍为什么会发生片状测试以及如何有效地处理它们——而无需每 5 分钟“重新运行”一次。 [赞助]
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bolt.diy是 Bolt.new 的新开源版本，可让您选择用于每个提示的 LLM。
8.【野生动物园18.2](https://click.convertkit-mail4.com/wvu9xd93o4sghk93rmvslun38mkxxa8/08hwhgudp766xo hl/aHR0chHM6Ly93ZWJraXQub3JnL2Jsb2cvMTYzMDEvd2Via2l0LWZlYXR1cmVzLWluLXNhZmFyaS0xOC0yLw==)声称是网络开发者“今年最大的新功能发布”。我很确定负责新苹果照片灾难重新设计的总理也说了同样的话，所以让我们祈祷它会比这更好。
9.【百万自动驾驶仪](https://click.convertkit-mail4.com/wvu9xd93o4sghk93rmvslun38mkxxa8/8ghqh3ul756632bk/aHR0cHM6Ly94LmNvbS9haWRlbnliYWkvc3RhdHVzLzE4NjcyMzk1MTY1MDA4NDg4MTQ=)是一个新的 VSCode 扩展，用于“修复”缓慢的 React 渲染。
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CarbonQA 提供[高质量的 QA 服务，比例](https://click.convertkit-mail4.com/wvu9xd93o4sghk93rmvslun38mkxxa8/vqh3hmupqk9944bg/aHR0cHM6Ly9jYXJib25 xYS5jb20vP3V0bV9jYW1wYWlnbj1jb29sX2JpdHMmdXRtX2NvbnRlbnQ9ZGVjMTYmdXRtX21lZGl1bT1lbWFpbCZ1dG1fc291cmNlPWJ5dGVz）。他们位于美国的测试人员会反复破坏您的应用程序，并进行所有您讨厌自己做的手动测试。 [赞助]
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[Node.js 性能状况2024](https://click.convertkit-mail4.com/wvu9xd93o4sghk93rmvslun38mkxxa8/l2heh6u3dkmm 4vt6/aHR0chHM6Ly9ub2Rlc291cmNlLmNvbS9ibG9nL1N0YXRlLW9mLU5vZGVqcy1QZXJmb3JtYW5jZS0yMDI0)分析了今年发布的所有 Node 新版本，看看运行时在 2024 年是如何演变的。
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霍尔格·达尔·摩根森 创建Svader，用于创建的库具有 WebGL 和 WebGPU 片段着色器的 GPU 渲染 Svelte 组件。我 80% 确信 Svader 也是《Rocket Power》中一个擅长踢空翻和恶作剧 shoobies 的角色的名字。
小测验：答案
由[无限红]赞助(https://click.convertkit-mail4.com/wvu9xd93o4sghk93rmvslun38mkxxa8/58hvh8um49ddnxs6/aHR0cHM6Ly9pbmZpbml0ZS5yZWQvYnl0ZXM=)
控制台记录了什么？
const res = ["👨", "", "👩", "", "👧", "", "👦"].join('')
console.log(res) // 👨👩👧👦
这是“👨👩👧👦”表情符号。
这是可行的，因为 Unicode 标准支持使用零宽度连接符映射单个表情符号来创建新的表情符号。 在我们的例子中，将单独的表情符号组合起来以获得家庭表情符号。哇，编程。
希望我们说好话
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