Hello

This is the most minimal example of a Gesso application - a starting point for anything you might build.

Configuration

The argument to launch is an AppSpec record. The Gesso manual has a section covering AppSpec in detail.

Here, we use:

• name - the ID of our application - is "hello"
• initialState is unit because this application doesn’t track any state
• the viewBox is null, meaning we don’t need a custom coordinate system for the drawing - we’ll just use the dimensions of the canvas
• window is Fullscreen, so the canvas will take up the entire page
• in behavior, we overwrite the default render function with our function that draws the text "hello world"

Sample output

See this example in action