Button

When not to use it

There are exactly two variants and no way to add a third - a row that wants a primary, a secondary and a tertiary action is a row that has not decided what actually matters on that screen. If a project genuinely needs a third weight, that is a sign the section has too many equally important actions, not a missing prop.

href decides the element, not just the look

href swaps the rendered tag from <button> to <a> - it is not a style switch. That matters for anything reading the DOM rather than the pixels: a link-shaped action is in the browser's navigation history and works with open-in-new-tab, a button-shaped one is not. Pass href for anything that changes the URL, and onClick for anything that does not, rather than reaching for onClick with a manual window.location inside it.