HOWTO - trigger source button in ckeditor by another button which is outside the editor

Question

I have a textarea which is behaving like a ckeditor. In the editor there is a button to view the content as source/html. I have a input button above the textarea to preview the textarea content as html Means on click of my preview button it will trigger the ckeditor button click. Can anybody help me please..?

Answer 1

Shortest answer ever:

editor.execCommand( 'source' );