以编程方式添加的属性中的 onload 事件 [重复]

Question

为什么在以下代码中添加元素时没有触发onload事件：

function create() {
var para = document.createElement("p");     

para.setAttribute('onload', 'myFunction');

var node = document.createTextNode("This is new.");
para.appendChild(node);

var element = document.getElementById("div1");
element.appendChild(para);


}

function myFunction() {
  alert(1);
}

<div id="div1">
<p id="p1">This is a paragraph.</p>
<p id="p2">This is another paragraph.</p>
</div>

<br>

<button onclick="create()">create</button>

这不是在元素上设置属性的正确方法还是没有触发 onload 函数的问题？

Answer 1

这是你想要的吗？

function create() {
var para = document.createElement("p");

var node = document.createTextNode("This is new.");
para.appendChild(node);

para.onload = myFunction();

var element = document.getElementById("div1");
element.appendChild(para);


}

function myFunction() {
  alert(1);
}

<div id="div1">
<p id="p1">This is a paragraph.</p>
<p id="p2">This is another paragraph.</p>
</div>

<br>

<button onclick="create()">create</button>

Answer 2

尝试使用DOMSubtreeModified事件：

function create() {
var para = document.createElement("p");     

$("body").on('DOMSubtreeModified', para, myFunction());
//para.setAttribute('onload', 'myFunction');

var node = document.createTextNode("This is new.");
para.appendChild(node);

var element = document.getElementById("div1");
element.appendChild(para);


}

function myFunction() {
  alert(1);
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="div1">
<p id="p1">This is a paragraph.</p>
<p id="p2">This is another paragraph.</p>
</div>

<br>

<button onclick="create()">create</button>