Class EventHooks<T, R>

Event emitter which allows listeners to return a value.

This is beneficial for the themes since it allows plugins to modify the HTML output without doing unsafe text replacement.

Very simple event emitter class which collects the return values of its listeners.

Example

const x = new EventHooks<{ a: [string] }, string>()
x.on('a', a => a.repeat(123)) // ok, returns a string
x.on('b', console.log) // error, 'b' is not assignable to 'a'
x.on('a' a => 1) // error, returns a number but expected a string
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