Tinymce Editor for Shortcode UI plugin.

admin.php

if ( ! function_exists( 'shortcode_enqueue_editor_scripts' ) ) {
	/**
	 * Enqueue our editor area scripts and styles.
	 */
	function shortcode_enqueue_editor_scripts() {
		wp_register_script( 'shortcode_editor_script', get_template_directory_uri() . '/js/admin/editor-script.js', array( 'shortcode-ui' ), false, true );
		wp_enqueue_script( 'shortcode_editor_script' );
	}
	/**
	 * Enqueue shortcode ui editor script after shortcode UI assets have been enqueued.
	 *
	 * @see Shortcode_UI::enqueue();
	 */
	add_action( 'enqueue_shortcode_ui', 'shortcode_enqueue_editor_scripts' );
}

editor-script.js

/**
 * Script for wp_enqueue_editor.
 */
(function ( $, wp ) {
	'use strict';

	// Boxout shortcode inner_content textarea selector.
	var boxOutEditor = 'textarea#inner_content';
	var editorLoaded = false;

	window.ShortCodeTinyMceEditor = {

		// Check if boxout editor is initialized or not.
		boxOutEditorInitialized: false,

		// Function to load TinyMCE Editor to selector.
		loadEditor: function ( selector ) {
			var _this = this;
			if ( $( selector ).length ) {
				// Check if editor is already initialized.
				if ( _this.boxOutEditorInitialized ) {
					// Destroy/Remove the tinyMCE object for the selector before initialized.
					tinymce.remove( selector );
					// Remove all controls from tinyMCE object for the selector.
					tinymce.execCommand('mceRemoveControl', true, selector);
				}
				// Initialize tinymce editor to selector textarea.
				tinyMCE.init({
					             selector: selector,
					             skin: 'wordpress',
					             paste_retain_style_properties: '',
					             menubar: false,
					             height : 200,
					             toolbar: "undo,redo,bold,italic,strikethrough,bullist,numlist,link",
					             plugins: ['paste', 'wordpress', 'wplink'],
					             init_instance_callback : function( editor ) {
						             _this.boxOutEditorInitialized = true;
					             },
				             });
				return true;
			} else {
				return false;
			}
		},

		// Function to unload TinyMCE Editor to selector.
		unloadEditor: function ( selector ) {
			var _this = this;
			if ( $( selector ).length ) {
				var editorContent = tinymce.activeEditor.getContent();
				$( selector )
					.text( editorContent )
					.trigger( 'input' );
				// Remove tinymce editor for selector.
				tinymce.remove( selector );
				// Remove all controls from tinyMCE object for the selector.
				tinymce.execCommand('mceRemoveControl', true, selector);
				_this.boxOutEditorInitialized = false;
				return true;
			} else {
				return false;
			}
		}
	};

	// Shortcode ui plugin render_edit shortcode action.
	wp.shortcake.hooks.addAction( 'shortcode-ui.render_edit', function() {
		editorLoaded = ShortCodeTinyMceEditor.loadEditor( boxOutEditor );
	} );

	// Shortcode ui plugin render_new shortcode action.
	wp.shortcake.hooks.addAction( 'shortcode-ui.render_new', function() {
		editorLoaded = ShortCodeTinyMceEditor.loadEditor( boxOutEditor );
	} );

	// Shortcode ui plugin render_destroy shortcode action.
	wp.shortcake.hooks.addAction( 'shortcode-ui.render_destroy', function() {
		if ( editorLoaded ) {
			ShortCodeTinyMceEditor.unloadEditor( boxOutEditor );
		}
	} );

})( jQuery, window.wp );