Jakubantalik/transitions.dev

This page introduces an external open-source repository. It is not an HDATF product.

What it does

transitions.dev is a repository that combines a collection of CSS transitions for web interfaces with a CLI that adds them to projects, a skill for coding agents, and transitions-agent, which checks interface motion. Its main users are front-end developers who want consistent screen transitions and animations, and people who build interfaces with coding agents such as Claude Code or Cursor. Each transition is provided as a copy-ready CSS snippet with :root custom properties, t- prefixed classes and prefers-reduced-motion handling. The transitions-dev CLI (MIT, Node 18 or later) adds and lists free transitions without an account, while Pro transitions are downloaded from api.transitions.dev after a device sign-in, with entitlement checked on every download. transitions-agent (MIT) scans interface code locally with 11 rules and gives a motion score from 0 to 100, and its GitHub Action posts a score comment on a PR and then opens a fix PR against that PR branch. The fix command sends the affected files to a hosted fix service, shows the changes Claude generates as a diff first, writes them to files only after the user approves, and is described as limited to CSS transitions and animation guards. The free sign-up tier offers unlimited scans and Action runs, unlimited fixes through the user's own Claude Code or Cursor, and up to 10 hosted fixes a month and 2 a day, while the Business plan at 59 dollars a month includes 5 Pro seats and 200 fixes a month. The custom Transitions.dev License allows modifying and shipping in personal and commercial projects and forbids redistribution as a competing library, and company use of Pro transitions or paid Agent features needs a Business seat for each person. The CLI and agent tooling are MIT, and GitHub's NOASSERTION license label appears to come from this custom license. Transition counts differ across sources, with 12 in the README table, 18 in the README text, 43 or more in the repository description, and 32 free plus 11 Pro in the agent document, so the actual number should be counted directly, and because hosted fixes send code to an outside service, the scope of files to send should be set before using it on company code.

License

Custom license Custom or non-standard license. Read the license file before any reuse.

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Only repositories in the ranked Trendshift lists are included, and the lists are used only to find candidates. We do not copy their ranks. Descriptions, licenses and star counts come from each GitHub repository. The notes are our own reading. We have not tested these projects, and a place on a trending list does not prove quality.