I have implemented a scaled-down version of EventTarget :
function test(foo: MyEventTarget | EventTarget) {
if (foo instanceof EventTarget) {
return foo.addEventListener("click", console.log);
}
else {
return foo.addEventListener("click", console.log);
}
}
// OKbut it"s so ugly.
so let me ask you:
this is a bug , which has not been resolved yet.
separate processing is also a solution, or through inheritance:
interface MyEventTarget extends EventTarget {
addEventListener(
type: string,
listener: EventListener | EventListenerOrEventListenerObject,
options?: boolean | AddEventListenerOptions
): void
}
function test(foo: MyEventTarget) {
return foo.addEventListener('click', console.log);
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