enabled

The enabled() method, called without any parameters, will return the current enabled state of the Editor widget.
The enabled(bool) method is used to update the Editor's enabled/disabled state. Passing true will enable and false will disable the widget.

<textarea id="editor"></textarea>

<script type="text/javascript">
    jQuery(function ($) {
        $('#editor').shieldEditor();

        // disable the control
        $("#editor").swidget().enabled(false);
    });
</script>