5 CSS Animations That Needed JavaScript Until 2026
New CSS features introduced in 2026 allow for animations that previously required JavaScript. These updates include transitioning to height auto, animating elements in and out of display none, and creating smooth native accordions. The advancements simplify the animation process and eliminate the need for complex JavaScript solutions.
- ▪CSS now supports transitioning to height auto, eliminating the need for JavaScript measuring scripts.
- ▪The allow-discrete property enables elements to animate in and out of display none smoothly.
- ▪New features allow for the creation of native, animated disclosures without JavaScript.
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| Original publisher | DEV.to (Top) |
| Canonical URL | https://dev.to/raxxostudios/5-css-animations-that-needed-javascript-until-2026-2p4j |
| Publication time | Wed, 27 May 2026 07:22:29 +0000 |
| Retrieval time | 2026-05-27T07:37:56.853Z |
| Last seen | 2026-05-27T07:37:56.853Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | muTDTPuAEm9c |
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| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3848289) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } RAXXO Studios Posted on May 27 • Originally published at raxxo.shop 5 CSS Animations That Needed JavaScript Until 2026 #ai #productivity #claudecode #automation interpolate-size and calc-size finally let a panel transition to height auto with no measuring script. transition-behavior allow-discrete plus @starting-style animates elements both into and out of display none. ::details-content turns the native details element into a smooth disclosure with zero JavaScript.
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