Hi,
Currently all major browsers (except Internet Explorer) offer their own built-in spellcheckers that perform inline spell checking out-of-the box in the editable elements: textareas, editable iframe and div elements. The content area of RadEditor is an editable IFRAME( or DIV if ContentAreaMode is set to DIV) and the required spell as you type feature is offered out-of-the box by Firefox, Chrome, Safari and Opera. It will be also offered by the upcoming IE10 and for this reason we do not plan to implement such functionality which will decrease the editing of larger content if it is implemented with JavaScript, which is 10 times slower than the native compiled code.
At present you can use the inline spellchecker of RadEditor in all browsers but you should click the spellcheck button. Another approach is to use the built-in spellchecker of the non IE browsers for inline spellcheck in realtime, and use the RadEditor's spellcheck for IE.
Regards,
Marin Bratanov
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their
blog feed now.