BeforeUnloadEvent

import DOM

class Event

protocol Any_Event_or_String : ConvertibleToJSValue

protocol ConstructibleFromJSValue

Types conforming to this protocol can be constructed from JSValue.

protocol ConvertibleToJSValue

Objects that can be converted to a JavaScript value, preferably in a lossless manner.

protocol CustomStringConvertible

A type with a customized textual representation.

protocol JSBridgedClass : JSBridgedType

Conform to this protocol when your Swift class wraps a JavaScript class.

protocol JSBridgedType : ConstructibleFromJSValue, ConvertibleToJSValue, CustomStringConvertible

Use this protocol when your type has no single JavaScript class. For example, a union type of multiple classes or primitive values.

required init(unsafelyWrapping jsObject: JSObject)

override class var constructor: JSFunction? { get }

var returnValueAsString: String { get set }