Question

i know how to execute execCommand on some selected text, but is there a way to execute on some other text in my contenteditable div ?

Answer 1

In IE, yes. In other browsers, no.

All major desktop browsers implement some form of document.execCommand(), which acts only on the user selection. In IE, the TextRange object also has an execCommand method. For example, the following will turn the text contents of an element green when the user hovers the cursor over it:

<div id="test">Here is a test div</div>

<script type="text/javascript">
    var div = document.getElementById("test");
    div.onmouseover = function() {
        if (document.body.createTextRange) {
            var textRange = document.body.createTextRange();
            textRange.moveToElementText(div);
            textRange.execCommand("foreColor", false, "green");
        }
    };
</script>