Rails 8 developers can now implement clipboard functionality using a modern Stimulus controller that leverages the `navigator.clipboard` API. This approach provides seamless text copying from input fields, textareas, or static HTML elements with built-in user feedback.

The solution uses Stimulus targets and values to manage source elements and button states. When users click the copy button, the text is written to clipboard while the button temporarily displays "Copied!" for two seconds before reverting to its original state.

Production deployments require HTTPS since the clipboard API only works in secure contexts. Developers using icons instead of text buttons need alternative CSS-based approaches to preserve visual elements during state changes. This pattern enhances UX for sharing links, API keys, and discount codes.