app.templates.render = function (name, value, ...args) {  const template = app.templates[name];   if (Array.isArray(value)) {    let result = "";    for (var val of value) {      result += template(val, ...args);    }    return result;  } else if (typeof template === "function") {    return template(value, ...args);  } else {    return template;  }};