EventTarget()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since setembro de 2020.
O construtor EventTarget() cria uma nova instância do objeto EventTarget.
Sintaxe
var myEventTarget = new EventTarget();
Parâmetros
Nenhum.
Retorno de valor
Uma instância do objeto EventTarget.
Exemplos
js
class MyEventTarget extends EventTarget {
constructor(mySecret) {
super();
this._secret = mySecret;
}
get secret() {
return this._secret;
}
}
let myEventTarget = new MyEventTarget(5);
let value = myEventTarget.secret; // == 5
myEventTarget.addEventListener("foo", function (e) {
this._secret = e.detail;
});
let event = new CustomEvent("foo", { detail: 7 });
myEventTarget.dispatchEvent(event);
let newValue = myEventTarget.secret; // == 7
Especificações
| Specification |
|---|
| DOM> # ref-for-dom-eventtarget-eventtarget①> |