Trying to append to an element using js?

问题

I am trying to add to all <object>'s on a page a snippet of html. I understand I can access elements by tag name and that I can change the element, but can I simple append to it instead?

In addition, I want to add it to the contents of each tag, not the end of the document. Which of these methods will work?

回答1:

Assuming no library...

var elementToAppend = document.createElement(tagName); // Your tag name here

// Set attributes and properties on elementToAppend here with
// elementToAppend.attribute = value (eg elementToAppend.id = "some_id")
// You can then append child text and elements with DOM methods
// (createElement or createTextNode with appendChild)
// or with innerHTML (elementToAppend.innerHTML = "some html string")

var objects = document.getElementsByTagName('object');
for(var i = 0; i < objects.length; i++) {
    elementToAppend = elementToAppend.cloneNode(true);
    objects[i].appendChild(elementToAppend);
}

Using innerHTML or outerHTML as other answers have suggested will likely cause problems for whatever you've embedded with <object>.

回答2:

appendChild is what you're looking for.

来源：https://stackoverflow.com/questions/1168349/trying-to-append-to-an-element-using-js