How can the tinymce textarea be made read-only/disabled?

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There are two ways to make the TinyMCE textarea read-only/disabled:

1. Using the TinyMCE API:

// Get the editor instance
var editor = tinymce.get('mytextarea');

// Disable the editor
editor.setMode('readonly');

// Enable the editor
editor.setMode('design');

1. Using HTML attributes:

<textarea id="mytextarea" readonly></textarea>

or

<textarea id="mytextarea" disabled></textarea>

Note: the readonly attribute allows the user to view the content, but not edit it. The disabled attribute prevents the user from interacting with the textarea at all.