PostHTML is a tool to transform HTML/XML with JS plugins. PostHTML itself is very small. It includes only a HTML parser, a HTML node tree API and a node tree stringifier.

Kamran Ahmed has developed this light-weight, no-dependency, vanilla JavaScript engine to drive user's focus across the page.

Storybook is the most popular UI component development tool for React, Vue, and Angular. It helps you develop and design UI components outside your app in an isolated environment.