Tailwind doesn't exist without a build step (at least since v2) — the whole point of Tailwind is that it is a build tool, an alternative syntax for writing CSS.
There's a kind of development version where that build step runs in the browser on page load, but it's still a build step in the sense of generating all that CSS dynamically, and it will produce a poor experience for a user if you try and use it in production.
There's a kind of development version where that build step runs in the browser on page load, but it's still a build step in the sense of generating all that CSS dynamically, and it will produce a poor experience for a user if you try and use it in production.