"of" pattern

1

CodeMirror has an “of” pattern in many of its functions:

let syncAnnotation = Annotation.define<boolean>()
syncAnnotation.of(true)
// ...
Transaction.userEvent.of(userEvent)

I have not encountered this pattern before and I am having trouble understanding it. What is the name of this pattern? Can you suggest a source to understand it better?

2

It’s just a method name used to create an instance of a given type of object. Transaction.userEvent is an annotation type. Calling .of creates an annotation with the given value.

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