Javascript 如何向数组的每个id添加eventListener?
我想要的是为我拥有的每个id添加一个eventListener,如下所示:Javascript 如何向数组的每个id添加eventListener?,javascript,Javascript,我想要的是为我拥有的每个id添加一个eventListener,如下所示: var butn = [document.getElementById("b1"), document.getElementById("b2"), document.getElementById("b3"), document.getElementById("b4"), document.getElementById("b5"), document.getElementById("b6"),
var butn = [document.getElementById("b1"), document.getElementById("b2"), document.getElementById("b3"),
document.getElementById("b4"), document.getElementById("b5"), document.getElementById("b6"),
document.getElementById("b7"), document.getElementById("b8"), document.getElementById("b9")]
butn.addEventListener("click", doSet)
var ids = ['b1', 'b2', 'b3', 'b4', 'b5'];
for (var i = 0; i < ids.length; i++) {
document.getElementById(ids[i]).addEventListener("click", doSet);
}
如何在不使用太多代码的情况下做到这一点?您可以这样做:
var butn = [document.getElementById("b1"), document.getElementById("b2"), document.getElementById("b3"),
document.getElementById("b4"), document.getElementById("b5"), document.getElementById("b6"),
document.getElementById("b7"), document.getElementById("b8"), document.getElementById("b9")]
butn.addEventListener("click", doSet)
var ids = ['b1', 'b2', 'b3', 'b4', 'b5'];
for (var i = 0; i < ids.length; i++) {
document.getElementById(ids[i]).addEventListener("click", doSet);
}
您可以这样做:
var butn = [document.getElementById("b1"), document.getElementById("b2"), document.getElementById("b3"),
document.getElementById("b4"), document.getElementById("b5"), document.getElementById("b6"),
document.getElementById("b7"), document.getElementById("b8"), document.getElementById("b9")]
butn.addEventListener("click", doSet)
var ids = ['b1', 'b2', 'b3', 'b4', 'b5'];
for (var i = 0; i < ids.length; i++) {
document.getElementById(ids[i]).addEventListener("click", doSet);
}
因为你所有的ID都是以“b”开头的:
因为你所有的ID都是以“b”开头的: