This section highlights the main functionality of the React Cosmos UI.
Visit reactcosmos.org/demo/ (opens in a new tab) for a live demo of React Cosmos.
An elegant file-system based tree view navigation system. Folders can be collapsed, and their state persists between sessions.
A snappy fixture search feature with fuzzy matching. Use
⌘ + K from anywhere to launch the search modal.
A convenient way to keep certain fixtures readily accessible while actively working with them.
The fixture preview is the heart of React Cosmos. It loads a Cosmos renderer in an
iframe within the Cosmos UI.
Communication and state synchronization between the Cosmos UI and the renderer is accomplished through
window.postMessage (opens in a new tab).
Viewport controls that allow simulation of screen size and orientation, with the option to choose from a predefined list of common devices.
A screen size can be embedded into a fixture using the
Launch the selected fixture into a full-screen preview, breaking away from the Cosmos UI shell.
A full-screen preview functions as a Remote Renderer.
You can have multiple DOM remote renderers open simultaneously, allowing you to view the same fixture on different resolutions, browsers, or devices. It's also possible to preview different fixtures concurrently. The React Native renderer is another example of a remote renderer.
You can open a remote renderer by using the "Copy remote renderer URL" button from the home screen, or by launching a Full-Screen Preview. In the former case the renderer will follow the selected fixture from the Cosmos UI, while in the latter case the selected fixture is locked for that renderer.
Communication and state synchronization between the Cosmos UI and a remote renderer is accomplished through
WebSocket. State synchronization between multiple renderers is supported, with one primary renderer controlling the state while the others mirror it.
The reload renderer button triggers a full reload of the fixture preview. It is particularly useful for React Native apps, as it invokes
DevSettings.reload within the renderer.
Launches the source code of the current fixture in your default code editor.
Note You need to install the Open Fixture Plugin to enable this capability.
UI controls that provide powerful component data manipulation.
Three types of controls are currently supported:
|Automatically generated based on React element props. Only works with Node Fixtures.
|Automatically generated based on React Class components, which are deprecated but supported indefinitely.
|Defined using custom fixture hooks that can be represented as text inputs or select dropdowns.
The Cosmos UI features two slick resizable and collapsible panels on each side. Their state persists between sessions.
A beautiful notifications interface used to communicate renderer and server connectivity, and other useful information. It can be invoked from anywhere in the Cosmos UI, including 3rd party plugins.
The Cosmos UI supports a set of useful keyboard shortcuts for the most commonly used actions:
|Toggle fixture list
|Toggle control panel
|Go full screen
The Cosmos UI can be extended using UI Plugins.