Turn WordPress editor resizing on and off based on page template

admin-custom.js

jQuery( document ).ready( function( $ ) {
    // our variables
    var page_template           = $( '#page_template' ),        // Page - page template select box
        main_editor_container   = $( '#postdivrich' ),          // All - main editor
        editor_expand_toggle    = $( '#editor-expand-toggle' ); // All - the checkbox to turn autoresizing of the editor on and off.

    // function that flips the switch to turn the auto resize of the MCE editor on and off
    // basically, it gets it to reinitialize itself once we've shown it after hiding it, fixing layout issues
    function expand_toggle(){
        if( editor_expand_toggle.prop( 'checked' ) ) {

            setTimeout( function () {
                window.editorExpand.off();
                window.editorExpand.on();
            }, 401 );
        }
    }

    // listen for a template change
    page_template.change( function() {

        switch( $( this ).val() ) {

            case 'template-sectional.php':
                main_editor_container.slideUp();
                break;

            case 'template-big-head.php':
                main_editor_container.slideDown();
                break;

            default:
                main_editor_container.slideDown();
        }
        // flip the switch
        expand_toggle();

    } ).change();
} );

// Auto resize WordPress editor
if ( $( '#editor-expand-toggle' ).prop( 'checked' ) ) {
    window.editorExpand.off();
    window.editorExpand.on();
}

Uncaught TypeError: Cannot read property 'off' of undefined

On chrome I have set the mobile devices. How to get this fix ;)

@shivapoudel I never got an email with your comment, if you're still having an issue let me know.