javascript - How do I get the element being edited?

Question

I'm developing a webapp, and I have a problem with the JavaScript.

The following is a simplified version of the HTML causing the problem. I have some nested contenteditable divs (I replaced the real content with placeholder text):

<div contenteditable="true" id="div1">
    text
    <div contenteditable="inherit" id="div2">
        text
        <div contenteditable="inherit" id="div3">
            text
        </div>
        text
    </div>
    text
</div>

I want to get the element that's selected (being edited by the user) via JavaScript, but so far I haven't found a way to do it (successfully).

---

What I have tried and why it doesn't work:

I have tried using document.activeElement, which is supposed to return whichever element is in focus. Normally this works, but it doesn't produce the desired result when working with nested contenteditable elements. Instead of returning the element that's being edited by the user, it returns the uppermost contenteditable ancestor.

For instance, if div2 is selected/being edited, document.activeElement returns div1. If div3 was selected/being edited, document.activeElement also returns div1.

So I guess document.activeElement is not the right way to go about this.

---

How do I get the most specific element that's being edited, not its uppermost contenteditable ancestor?

Answer 1

I did it by inserting a dummy element at the caret position and finding it's direct parent.

function getActiveDiv() {
    var sel = window.getSelection();
    var range = sel.getRangeAt(0);
    var node = document.createElement('span');
    range.insertNode(node);
    range = range.cloneRange();
    range.selectNodeContents(node);
    range.collapse(false);
    sel.removeAllRanges();
    sel.addRange(range);
    var activeDiv = node.parentNode;
    node.parentNode.removeChild(node);
    return activeDiv;
}

I did an example on fiddle: https://jsfiddle.net/shhe05cj/4/

I run it on every keypress event that's bind to the relevant divs.

I based it on another thread that did something similar:Set caret position right after the inserted element in a contentEditable div