14 lines
333 B
TypeScript
14 lines
333 B
TypeScript
class EventBase {
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private _listeners = [];
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add(listener: (...args: any[]) => void): void {
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this._listeners.push(listener);
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}
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}
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class StringEvent extends EventBase { // should work
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add(listener: (items: string) => void ) { // valid, items is subtype of args
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super.add(listener);
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}
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}
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