Add comments based on meta data under each gallery entry in modern gallery template

module.js

/**
 * Add specific meta field under each entry in the gallery
 *
 * styling can be done using:
 * .reason {
 *    ...
 * }
 *
 * Replace `meta.waarom` with something else to use another meta key
 */
window.bbbx_modules = window.bbbx_modules || []; // Make modules array if not yet exists
window.bbbx_modules.push(function(sandbox, $) {

	var NAME = 'wpgreasonmeta';

	var exports = {
		NAME: NAME,

		init: function() {
		    window._template = BBBX.template.parse;
			BBBX.template.parse = this.parse;
		},
		
		parse: function(template, data) {
		    if( 
		        data.hasOwnProperty('meta') && 
		        data.meta.hasOwnProperty('waarom') && 
		        template.indexOf('entry') > -1 
		    ) {
		        template = template.replace('</figure>', '</figure><div class="reason" style="text-align:center; padding: 10px"><%= meta.waarom %></div>');
		    }
		    
		    return window._template.apply(this, arguments);
		},

		destroy: function() {
			BBBX.template.parse = window._template;
		}
	};

	return exports;

});