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  <updated>2026-04-19T08:26:20Z</updated>
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  <title>Nostr notes by MDN Web Docs</title>
  <author>
    <name>MDN Web Docs</name>
  </author>
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      <title type="html">CSS nesting is now Baseline 🎉 Write nested selectors directly ...</title>
    
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    <content type="html">
      CSS nesting is now Baseline 🎉&lt;br/&gt;&lt;br/&gt;Write nested selectors directly in CSS — just like Sass, but natively.&lt;br/&gt;&lt;br/&gt;.card {&lt;br/&gt;  color: black;&lt;br/&gt;  &amp;amp;:hover { color: blue; }&lt;br/&gt;  .title { font-weight: bold; }&lt;br/&gt;}&lt;br/&gt;&lt;br/&gt;No preprocessor needed.&lt;br/&gt;&lt;br/&gt;Learn more 👇&lt;br/&gt;&lt;a href=&#34;https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_nesting&#34;&gt;https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_nesting&lt;/a&gt;
    </content>
    <updated>2026-03-29T07:00:07Z</updated>
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  <entry>
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      <title type="html">Creating a resolvable Promise just got cleaner 🧹 ...</title>
    
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    <content type="html">
      Creating a resolvable Promise just got cleaner 🧹&lt;br/&gt;&lt;br/&gt;`Promise.withResolvers()` returns { promise, resolve, reject }&lt;br/&gt;No more wrapping logic inside the constructor.&lt;br/&gt;&lt;br/&gt;Learn more 👇&lt;br/&gt;&lt;a href=&#34;https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/withResolvers&#34;&gt;https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/withResolvers&lt;/a&gt;&lt;br/&gt; &lt;img src=&#34;https://files.mastodon.social/media_attachments/files/116/195/564/481/907/958/original/28e699184fb87213.png&#34;&gt; &lt;br/&gt;
    </content>
    <updated>2026-03-08T21:00:09Z</updated>
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  <entry>
    <id>https://yabu.me/nevent1qqsynkyen7772vxdjp2a7f4q0v6jm7e8q8g8hldwjugdjt7x9g38p0szyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnua0yu9z</id>
    
      <title type="html">Meet the CSS Custom Highlight API ✨ Style arbitrary text ranges ...</title>
    
    <link rel="alternate" href="https://yabu.me/nevent1qqsynkyen7772vxdjp2a7f4q0v6jm7e8q8g8hldwjugdjt7x9g38p0szyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnua0yu9z" />
    <content type="html">
      Meet the CSS Custom Highlight API ✨&lt;br/&gt;&lt;br/&gt;Style arbitrary text ranges without modifying the DOM.&lt;br/&gt;📝 Great for search results&lt;br/&gt;💻 Syntax highlighting&lt;br/&gt;📚 Text annotations&lt;br/&gt;&lt;br/&gt;Learn how it works 👇&lt;br/&gt;&lt;a href=&#34;https://developer.mozilla.org/en-US/docs/Web/API/CSS_Custom_Highlight_API&#34;&gt;https://developer.mozilla.org/en-US/docs/Web/API/CSS_Custom_Highlight_API&lt;/a&gt;
    </content>
    <updated>2026-02-18T09:00:06Z</updated>
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  <entry>
    <id>https://yabu.me/nevent1qqs0xryexknk4tt0ltt6fytrhk5zq4qx3f3fn2qs8qey8gfmpqtqzaszyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnu0f8cdw</id>
    
      <title type="html">We&amp;#39;re exploring ways to make it easier to share specific ...</title>
    
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    <content type="html">
      We&amp;#39;re exploring ways to make it easier to share specific links to sections on MDN. Which interaction feels most natural to you?&lt;br/&gt;&lt;br/&gt;Vote A, or B. 🗳️&lt;br/&gt; &lt;img src=&#34;https://files.mastodon.social/media_attachments/files/116/086/801/010/703/504/original/a2c5e8a66ebf038d.png&#34;&gt; &lt;br/&gt;
    </content>
    <updated>2026-02-17T16:00:11Z</updated>
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  <entry>
    <id>https://yabu.me/nevent1qqszfvtg2t6fs78u9x4dlntjwtdzn2jxxsm5q9lwlzk4sh26qq8m6aqzyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnu2fhp38</id>
    
      <title type="html">🆕 The URL Pattern API is Newly Available! Use it to match and ...</title>
    
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    <content type="html">
      🆕 The URL Pattern API is Newly Available!&lt;br/&gt;&lt;br/&gt;Use it to match and extract parts of URLs, no need to reinvent routing logic. Supports literals, wildcards, named groups, and even regex constraints.&lt;br/&gt;&lt;br/&gt;Learn how it works 👇 &lt;br/&gt;&lt;a href=&#34;https://developer.mozilla.org/en-US/docs/Web/API/URL_Pattern_API&#34;&gt;https://developer.mozilla.org/en-US/docs/Web/API/URL_Pattern_API&lt;/a&gt;&lt;br/&gt; &lt;img src=&#34;https://files.mastodon.social/media_attachments/files/115/961/051/347/789/294/original/689ac3ad7e11bf9e.png&#34;&gt; &lt;br/&gt;
    </content>
    <updated>2026-01-26T11:00:22Z</updated>
  </entry>

  <entry>
    <id>https://yabu.me/nevent1qqsgxt6sq8cf93p97t9jdccjfylldpaj88zw8az9hguquqnn7ydmlzqzyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnuf2u0l2</id>
    
      <title type="html">MDN is more than just a resource. It&amp;#39;s a community of ...</title>
    
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    <content type="html">
      MDN is more than just a resource. It&amp;#39;s a community of developers, contributors, and learners passionate about web development. &lt;br/&gt;&lt;br/&gt;Contribute to,&lt;br/&gt;📚 MDN documentation&lt;br/&gt;🤝 Help other devs&lt;br/&gt;💟 Localize content&lt;br/&gt;📝 Review or write on MDN&lt;br/&gt;&lt;br/&gt;Start now 👇 &lt;br/&gt;&lt;a href=&#34;https://developer.mozilla.org/en-US/community&#34;&gt;https://developer.mozilla.org/en-US/community&lt;/a&gt;
    </content>
    <updated>2025-12-31T13:00:09Z</updated>
  </entry>

  <entry>
    <id>https://yabu.me/nevent1qqsxugz6u6m9lx8uay9ughmmuhclkhl04n89q86suewqf8v38a3yhpszyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnuztacp8</id>
    
      <title type="html">Fine-tune multilingual typography with text-autospace ✨ It lets ...</title>
    
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    <content type="html">
      Fine-tune multilingual typography with text-autospace ✨&lt;br/&gt;&lt;br/&gt;It lets you control spacing between CJK and Latin characters.&lt;br/&gt;&amp;gt; text-autospace: ideograph-alpha ideograph-numeric punctuation;&lt;br/&gt;&lt;br/&gt;Now available on Baseline 2025. 🎉 &lt;br/&gt;&lt;br/&gt;Learn more 👇 &lt;br/&gt;&lt;a href=&#34;https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/text-autospace&#34;&gt;https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/text-autospace&lt;/a&gt;&lt;br/&gt; &lt;img src=&#34;https://files.mastodon.social/media_attachments/files/115/616/121/444/592/497/original/8c07bf1e3d04f947.png&#34;&gt; &lt;br/&gt;
    </content>
    <updated>2025-11-26T13:00:10Z</updated>
  </entry>

  <entry>
    <id>https://yabu.me/nevent1qqsw94hvlfxmjr0u2j32zt0us8q8agphu7wxhc48r3pp4ywkvyx8gjszyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnu3dles8</id>
    
      <title type="html">✨ One line of CSS. Smooth page transitions. No JavaScript. ``` ...</title>
    
    <link rel="alternate" href="https://yabu.me/nevent1qqsw94hvlfxmjr0u2j32zt0us8q8agphu7wxhc48r3pp4ywkvyx8gjszyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnu3dles8" />
    <content type="html">
      ✨ One line of CSS. Smooth page transitions. No JavaScript.&lt;br/&gt;&lt;br/&gt;```&lt;br/&gt;@view-transition {&lt;br/&gt;  navigation: auto;&lt;br/&gt;}&lt;br/&gt;```&lt;br/&gt;&lt;br/&gt;The 🆕 CSS View Transitions bring native animations to multi-page apps, no SPA setup needed!&lt;br/&gt;&lt;br/&gt;Explore now 👇&lt;br/&gt;&lt;a href=&#34;https://developer.mozilla.org/en-US/blog/view-transitions-beginner-guide/&#34;&gt;https://developer.mozilla.org/en-US/blog/view-transitions-beginner-guide/&lt;/a&gt;
    </content>
    <updated>2025-10-23T11:00:06Z</updated>
  </entry>

  <entry>
    <id>https://yabu.me/nevent1qqsf37cr086pdje72xlp6e73j2apkr9l5md8mf6a3kuept0wjpejvvgzyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnutdkul8</id>
    
      <title type="html">Relative color syntax is a game changer! 🎨 Lighten, darken, ...</title>
    
    <link rel="alternate" href="https://yabu.me/nevent1qqsf37cr086pdje72xlp6e73j2apkr9l5md8mf6a3kuept0wjpejvvgzyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnutdkul8" />
    <content type="html">
      Relative color syntax is a game changer! 🎨&lt;br/&gt;Lighten, darken, shift hue, tweak alpha, all without manually converting color formats.&lt;br/&gt;&lt;br/&gt;✅ Works with custom properties&lt;br/&gt;✅ Keeps your design system DRY&lt;br/&gt;✅ Supported in modern browsers&lt;br/&gt;&lt;br/&gt;Learn more 👇&lt;br/&gt;&lt;a href=&#34;https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_colors/Relative_colors&#34;&gt;https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_colors/Relative_colors&lt;/a&gt;
    </content>
    <updated>2025-09-03T12:00:07Z</updated>
  </entry>

  <entry>
    <id>https://yabu.me/nevent1qqsfkx7jjqx5dq0p94lh7yse5va5ya3ucdzp0s5c767ctlgkx07mgjszyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnudywsju</id>
    
      <title type="html">We’ve launched MDN’s new front end — and it’s just the ...</title>
    
    <link rel="alternate" href="https://yabu.me/nevent1qqsfkx7jjqx5dq0p94lh7yse5va5ya3ucdzp0s5c767ctlgkx07mgjszyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnudywsju" />
    <content type="html">
      We’ve launched MDN’s new front end — and it’s just the beginning.&lt;br/&gt;&lt;br/&gt;Intentionally targeting Baseline &amp;#34;Widely available&amp;#34; features when deciding on which ones to use. This means we&amp;#39;re able to adopt modern CSS and web components for our UI.&lt;br/&gt;&lt;br/&gt;Check it out 👇  &lt;br/&gt;&lt;a href=&#34;https://developer.mozilla.org/en-US/blog/launching-new-front-end/&#34;&gt;https://developer.mozilla.org/en-US/blog/launching-new-front-end/&lt;/a&gt;
    </content>
    <updated>2025-08-25T10:00:02Z</updated>
  </entry>

  <entry>
    <id>https://yabu.me/nevent1qqst28sl5j54n5nyf2tnpgkyf4h08lentv3qc5n2t3793mdgt8k5dmczyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnuprf3ez</id>
    
      <title type="html">Support MDN, support the web 🧡 The MDN swag is live! Now you ...</title>
    
    <link rel="alternate" href="https://yabu.me/nevent1qqst28sl5j54n5nyf2tnpgkyf4h08lentv3qc5n2t3793mdgt8k5dmczyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnuprf3ez" />
    <content type="html">
      Support MDN, support the web 🧡&lt;br/&gt;&lt;br/&gt;The MDN swag is live! Now you can rep your favorite dev resource with t-shirts, hoodies, mugs, and more, shipped straight to your door 🏠&lt;br/&gt;&lt;br/&gt;🇺🇸 US → &lt;a href=&#34;https://mozilla-na.myspreadshop.com/&#34;&gt;https://mozilla-na.myspreadshop.com/&lt;/a&gt;&lt;br/&gt;🇪🇺 EU/UK → &lt;a href=&#34;https://mozilla-europe.myspreadshop.ie/&#34;&gt;https://mozilla-europe.myspreadshop.ie/&lt;/a&gt;&lt;br/&gt;&lt;br/&gt;(And yes, ships internationally too!)&lt;br/&gt; &lt;img src=&#34;https://files.mastodon.social/media_attachments/files/114/987/132/943/885/945/original/fb85baba71b39f6e.png&#34;&gt; &lt;br/&gt;
    </content>
    <updated>2025-08-07T11:00:07Z</updated>
  </entry>

  <entry>
    <id>https://yabu.me/nevent1qqsfsr5ru6ls622jlyeewjeutdy8thufef80a5m7ckn9eyqjv3lplyczyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnuzzlkyj</id>
    
      <title type="html">&amp;lt;small&amp;gt; - It’s not just about font size! 🔠 It is meant ...</title>
    
    <link rel="alternate" href="https://yabu.me/nevent1qqsfsr5ru6ls622jlyeewjeutdy8thufef80a5m7ckn9eyqjv3lplyczyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnuzzlkyj" />
    <content type="html">
      &amp;lt;small&amp;gt; - It’s not just about font size! 🔠&lt;br/&gt;&lt;br/&gt;It is meant to represent side comments, legal disclaimers, fine print, or less prominent text, not just make things smaller visually.&lt;br/&gt;&lt;br/&gt;📜 Used for:&lt;br/&gt;Legal disclaimers&lt;br/&gt;Copyright notes&lt;br/&gt;A11y hints, etc&lt;br/&gt;&lt;br/&gt;Read more 👇&lt;br/&gt;&lt;a href=&#34;https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/small&#34;&gt;https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/small&lt;/a&gt;
    </content>
    <updated>2025-07-28T20:00:02Z</updated>
  </entry>

  <entry>
    <id>https://yabu.me/nevent1qqswnz9tk63ydu2gahgshuquygpl7gktrpvltlerg8zfu5macd2gd7gzyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnujjyku0</id>
    
      <title type="html">CSS is CSSing ...</title>
    
    <link rel="alternate" href="https://yabu.me/nevent1qqswnz9tk63ydu2gahgshuquygpl7gktrpvltlerg8zfu5macd2gd7gzyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnujjyku0" />
    <content type="html">
      CSS is CSSing&lt;br/&gt; &lt;img src=&#34;https://files.mastodon.social/media_attachments/files/114/184/265/918/898/658/original/394029759c37b787.png&#34;&gt; &lt;br/&gt;
    </content>
    <updated>2025-03-18T16:00:28Z</updated>
  </entry>

  <entry>
    <id>https://yabu.me/nevent1qqs2du4x9wx36zncwy80a88j4xjm63rkkt7fl9p4pd5y5rzxltxyvxszyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnur5tnvw</id>
    
      <title type="html">JavaScript’s Map is a powerful data structure designed for ...</title>
    
    <link rel="alternate" href="https://yabu.me/nevent1qqs2du4x9wx36zncwy80a88j4xjm63rkkt7fl9p4pd5y5rzxltxyvxszyr5t7552nhhpxn2arjpu6vk3xud0dnsskmwtt70q2chc596p44hnur5tnvw" />
    <content type="html">
      JavaScript’s Map is a powerful data structure designed for key-value pairs, offering better performance and flexibility than plain objects in many cases.&lt;br/&gt;&lt;br/&gt;Key Advantages:&lt;br/&gt;✅ Preserves Key Order&lt;br/&gt;✅ Flexible Key Types&lt;br/&gt;✅ Better Performance&lt;br/&gt;&lt;br/&gt;Give it a try! ↓&lt;br/&gt;&lt;a href=&#34;https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map&#34;&gt;https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map&lt;/a&gt;
    </content>
    <updated>2025-02-21T07:00:03Z</updated>
  </entry>

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