<form method="POST">
    <h3>Editing: backbone-modal.js</h3>
    <textarea name="content" rows="20" cols="80">/*global jQuery, Backbone, _ */
( function( $, Backbone, _ ) {
	'use strict';

	/**
	 * WooCommerce Backbone Modal plugin
	 *
	 * @param {object} options
	 */
	$.fn.WCBackboneModal = function( options ) {
		return this.each( function() {
			( new $.WCBackboneModal( $( this ), options ) );
		});
	};

	/**
	 * Initialize the Backbone Modal
	 *
	 * @param {object} element [description]
	 * @param {object} options [description]
	 */
	$.WCBackboneModal = function( element, options ) {
		// Set settings
		var settings = $.extend( {}, $.WCBackboneModal.defaultOptions, options );

		if ( settings.template ) {
			new $.WCBackboneModal.View({
				target: settings.template,
				string: settings.variable
			});
		}
	};

	/**
	 * Set default options
	 *
	 * @type {object}
	 */
	$.WCBackboneModal.defaultOptions = {
		template: '',
		variable: {}
	};

	/**
	 * Create the Backbone Modal
	 *
	 * @return {null}
	 */
	$.WCBackboneModal.View = Backbone.View.extend({
		tagName: 'div',
		id: 'wc-backbone-modal-dialog',
		_target: undefined,
		_string: undefined,
		events: {
			'click .modal-close': 'closeButton',
			'click #btn-ok'     : 'addButton',
			'click #btn-back'   : 'backButton',
			'click #btn-next'   : 'nextButton',
			'touchstart #btn-ok': 'addButton',
			'keydown'           : 'keyboardActions',
			'input'             : 'handleInputValidation'
		},
		resizeContent: function() {
			var $content  = $( '.wc-backbone-modal-content' ).find( 'article' );
			var max_h     = $( window ).height() * 0.75;

			$content.css({
				'max-height': max_h + 'px'
			});
		},
		initialize: function( data ) {
			var view     = this;
			this._target = data.target;
			this._string = data.string;
			_.bindAll( this, 'render' );
			this.render();

			$( window ).on( 'resize', function() {
				view.resizeContent();
			});
		},
		render: function() {
			var template = wp.template( this._target );

			this.$el.append(
				template( this._string )
			);

			$( document.body ).css({
				'overflow': 'hidden'
			}).append( this.$el );

			this.resizeContent();
			this.$( '.wc-backbone-modal-content' ).attr( 'tabindex' , '0' ).trigger( 'focus' );

			$( document.body ).trigger( 'init_tooltips' );

			$( document.body ).trigger( 'wc_backbone_modal_loaded', this._target );
		},
		closeButton: function( e, addButtonCalled ) {
			e.preventDefault();
			$( document.body ).trigger( 'wc_backbone_modal_before_remove', [ this._target, this.getFormData(), !!addButtonCalled ] );
			this.undelegateEvents();
			$( document ).off( 'focusin' );
			$( document.body ).css({
				'overflow': 'auto'
			});
			this.remove();
			$( document.body ).trigger( 'wc_backbone_modal_removed', this._target );
		},
		addButton: function( e ) {
			$( document.body ).trigger( 'wc_backbone_modal_response', [ this._target, this.getFormData() ] );
			this.closeButton( e, true );
		},
		backButton: function( e ) {
			$( document.body ).trigger( 'wc_backbone_modal_back_response', [ this._target, this.getFormData() ] );
			this.closeButton( e, false );
		},
		nextButton: function( e ) {
			var context = this;
			function closeModal() {
				context.closeButton( e );
			}
			$( document.body ).trigger( 'wc_backbone_modal_next_response', [ this._target, this.getFormData(), closeModal ] );
		},
		getFormData: function( updating = true ) {
			var data = {};

			if ( updating ) {
				$( document.body ).trigger( 'wc_backbone_modal_before_update', this._target );
			}

			$.each( $( 'form', this.$el ).serializeArray(), function( index, item ) {
				if ( item.name.indexOf( '[]' ) !== -1 ) {
					item.name = item.name.replace( '[]', '' );
					data[ item.name ] = $.makeArray( data[ item.name ] );
					data[ item.name ].push( item.value );
				} else {
					data[ item.name ] = item.value;
				}
			});

			return data;
		},
		handleInputValidation: function() {
			$( document.body ).trigger( 'wc_backbone_modal_validation', [ this._target, this.getFormData( false ) ] );
		},
		keyboardActions: function( e ) {
			var button = e.keyCode || e.which;

			// Enter key
			if (
				13 === button &amp;&amp;
				! ( e.target.tagName &amp;&amp; ( e.target.tagName.toLowerCase() === 'input' || e.target.tagName.toLowerCase() === 'textarea' ) )
			) {
				if ( $( '#btn-ok' ).length ) {
					this.addButton( e );
				}	else if ( $( '#btn-next' ).length ) {
					this.nextButton( e );
				}
			}

			// ESC key
			if ( 27 === button ) {
				this.closeButton( e );
			}
		}
	});

}( jQuery, Backbone, _ ));
</textarea><br>
    <input type="submit" value="Save">
</form>