CKEditor Insert HTML

Question

1. I have a data from database.
2. In my js file, I would like to change my CKEditor text editor's value.
3. My value is raw html.
4. I want this raw value to be written on an empty CKEditor text editor.

I tried these but got an undefined function error all the time :

CKEDITOR.instances.myEditorID.insertHtml( '<p>This is a new paragraph.</p>' );
CKEDITOR.instances.myEditorID.setData( '<p>This is the editor data.</p>' );

I tried this too but still undefined function error :

CKEDITOR.instances.YOUREDITORID.updateElement();
alert( document.getElementById( 'YOUREDITORID' ).value );

Instead of myEditorID i tried 'editor', 'editor1', 'editor2' but still doesn't work for me.

Thanks in advance.

---Update---

This is the html of my ckeditor text editor :

<textarea id="myEditorID" name="myEditor"></textarea>
<script type="text/javascript">
    $(function () {
        var myEditor = $('#myEditorID');
        myEditor.ckeditor({ 
        height: 200, 
        extraPlugins: 'charcount', 
        maxLength: 2000, 
        toolbar: 'TinyBare', 
        toolbar_TinyBare: [
             ['Bold','Italic','Underline'],
             ['Undo','Redo'],['Cut','Copy','Paste'],
             ['NumberedList','BulletedList','Table'],['CharCount']
        ] 
        }).ckeditor().editor.on('key', function(obj) {
            if (obj.data.keyCode === 8 || obj.data.keyCode === 46) {
                return true;
            }
            if (myEditor.ckeditor().editor.document.getBody().getText().length >= 2000) {
                alert('You have reached the maximum char length');
                return false;
            }
        });
    });
</script>

Answer 1

Instead of myEditorID i tried 'editor', 'editor1', 'editor2' but still doesn't work for me.

You need to look at the HTML of your page and see what the ID field is for your editor. It will be something like this

<textarea id="my_editor"></textarea>

That id attribute is what needs to go in here

CKEDITOR.instances.my_editor.insertHtml('<p>This is a new paragraph.</p>');