To make rounded Bootstrap buttons, start with Bootstrap’s .btn class and customize its border radius—or use MDB’s .btn-rounded helper if your project already includes MDB. The title “V04” does not identify a verified download: no specific asset, license, or Bootstrap compatibility target is established here, so the practical option is to create the style directly in your project.
What “V04” means—and what is verified
No specific “Bootstrap Buttons V04” package or download page is identified, so there is no verified file, license, or release compatibility to claim. The guidance below shows two documented ways to create rounded buttons: Bootstrap’s own customization system and MDB’s separate helper class.
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Bootstrap’s v5.3 button guide covers variants, sizes, states, and customization for buttons used in forms, dialogs, and other interface contexts: Bootstrap v5.3 buttons. It should not be read as proof that v5.3 is the latest release. Bootstrap’s Sass file on the mutable main branch is useful for understanding its source, but it does not establish the contents of a particular released version: Bootstrap button Sass source.
Choose an implementation path
| Path | What it uses | Best fit |
|---|---|---|
| Bootstrap-native customization | Bootstrap button classes and button CSS or Sass variables, including the border-radius setting. | A project styling Bootstrap’s own button component without adding MDB. |
| MDB helper | MDB’s .btn-rounded class, which MDB documents alongside outline variants. |
A project that already loads the relevant MDB styles. |
These are distinct approaches, not interchangeable Bootstrap core class names. MDB documents .btn-rounded in its own Bootstrap button guide; Bootstrap’s own guide instead describes variants, sizing, and customization. The cited material does not establish that MDB’s helper works without MDB’s relevant styles.
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Customize the radius with Bootstrap
Use Bootstrap’s button component and adjust its radius through the button styling system. The official guide documents CSS-variable customization, and Bootstrap’s main-branch Sass source defines --bs-btn-border-radius through a button radius variable. Because that source tracks a mutable branch, confirm the variable in the release your project actually uses before relying on it.
For Sass-based customization, configure Bootstrap’s button radius variable before compiling Bootstrap; for a CSS-based approach, override the button radius variable in the appropriate scope. Keep any override specific enough that it does not unexpectedly round unrelated controls. Consult the v5.3 button guide and the source for your installed release to confirm the available variables and their use.
Use MDB’s rounded helper when MDB is already present
MDB documents .btn-rounded and shows it combined with outline button variants. Apply it to the MDB button pattern used by your project, following the MDB documentation. Do not assume that adding the class alone will produce the documented appearance in a project that does not load MDB’s styles.
Keep the control semantic and accessible
- For an action, use a
<button>element where practical. Rounded styling does not change what the control does or how assistive technology interprets it. - Use an anchor for navigation. If an anchor triggers an in-page action instead of navigating, Bootstrap’s CSS documentation says to add
role="button": Bootstrap CSS guidance. - Do not communicate a button’s purpose through color alone. Keep its purpose clear in visible text or another accessible equivalent; Bootstrap’s button guide notes that color by itself does not convey meaning to assistive-technology users.
- If you use the base
.btnclass without a variant, define clear:focusor:focus-visiblestyling. Preserve a visible focus indicator when customizing appearance.
Check a purported V04 download before using it
If you find a package described as “V04,” verify its own contents and terms rather than inferring them from the title. Check which Bootstrap release it targets, whether it requires MDB or other styles, what files it contains, and what license permits. The available documentation does not verify any particular V04 asset or its compatibility.
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