以下是在我的html中为所有按钮元素添加事件监听器的代码。结果 - 没有注册事件监听器,也没有错误。
window.onload = function(){
addEvListeners();
// This function is to assign ELs to buttons in my HTML
function addEvListeners(){
var target = document.getElementsByTagName("button");
for (i = 0; i <= target.length - 1; i ++){
target[i].addEventListener("click", function(){model();},false);
}
}
function model(){
return true; // just for placeholder
}
}
<html>
<head>
<script>
window.onload = function(){
addEvListeners();
// This function is to assign ELs to buttons in my HTML
function addEvListeners(){
var target = document.getElementsByTagName("button");
for (i = 0; i <= target.length - 1; i ++){
target[i].addEventListener("click", function(){model();},false);
}
}
function model(){
console.log('yo!');
}
}
</script>
</head>
<body>
<button>Click Me</button>
</body>
</html>
这对我来说是可行的。最后我在控制台得到了一个哟。有没有可能你的按钮元素不存在于 onload
?