Svelte DevTools+ is a Chrome add-on that adds debugging tools specifically designed for Svelte applications to the Chrome Developer Tools. With this tool, developers can easily inspect the component hierarchy of a Svelte application in either a step-like or tree-like structure.

One of the standout features of Svelte DevTools+ is its visual representation of component nesting. This makes it incredibly easy to understand the structure of the application and how components are nested inside each other.

In addition to visualizing the component hierarchy, Svelte DevTools+ also allows developers to see real-time changes in a component's state and props. Any updates made to the state or props are immediately reflected in the DevTools, making it a breeze to track the application's behavior.

When selecting a component in the DevTools component tree, developers can dive deeper and inspect the component's props, state, and context. This provides valuable insights into the data and values passed to each component.

But Svelte DevTools+ doesn't stop at just inspecting. It also allows developers to modify the state and props of a selected component directly from the DevTools. This is incredibly useful for testing and debugging purposes, as it enables developers to experiment with different scenarios without modifying the actual code.

Lastly, Svelte DevTools+ offers a time-travel debugging feature. This powerful tool allows developers to inspect the application's state at different points in time and analyze how the state changes over the course of execution.

Overall, Svelte DevTools+ is a must-have for any Svelte developer. Its intuitive interface, powerful debugging features, and time-travel capabilities make it an invaluable tool for building and debugging Svelte applications.