Drop image into contenteditable in Chrome to the cursor

If you can get the co-ordinates of the drop location (which I assume must be possible), you can do it as follows (untested). I’m assuming you’ve got the co-ordinates of the drop location relative to the viewport as variables x and y and the dropped image as the variable img:

Demo: http://jsfiddle.net/KZqNj/

Code:

var range;

// Try the standards-based way first
if (document.caretPositionFromPoint) {
    var pos = document.caretPositionFromPoint(x, y);
    range = document.createRange();
    range.setStart(pos.offsetNode, pos.offset);
    range.collapse();
    range.insertNode(img);
}
// Next, the WebKit way
else if (document.caretRangeFromPoint) {
    range = document.caretRangeFromPoint(x, y);
    range.insertNode(img);
}
// Finally, the IE way
else if (document.body.createTextRange) {
    range = document.body.createTextRange();
    range.moveToPoint(x, y);
    var spanId = "temp_" + ("" + Math.random()).slice(2);
    range.pasteHTML('<span id="' + spanId + '">&nbsp;</span>');
    var span = document.getElementById(spanId);
    span.parentNode.replaceChild(img, span);
}

This will work in recent-ish WebKit, Opera and Mozilla browsers, although only Firefox has an implementation of document.caretPositionFromPoint().

References:

• http://dev.w3.org/csswg/cssom-view/#dom-document-caretpositionfrompoint