EventTarget()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
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 |
Compatibilidade com navegadores
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