let Mustache=require('mustache')
// Пример использования:
const template = `
--- Standard section (should NOT be affected) ---
{{#isAdmin}}
  Welcome Admin!
{{/isAdmin}}

{{^isUser}}
  Please log in.
{{/isUser}}

--- Our new section with {{+array}} and {{-array}} ---
{{+users}}
  Total users: {{users.length}}
  {{#users}}
    Hello, {{name}}!
  {{/users}}
{{-users}}

{{+products}}
  No products available.
{{-products}}

{{+emptyArray}}
  This should not be seen.
{{-emptyArray}}

--- Example with standard section that LOOKS similar ---
{{+users}}
  This is INSIDE the length check.
{{-users}}

--- Example that WON'T work without {{+}} and {{-}} ---
{{#users}} // This is a standard section. It will not be replaced.
  This is a standard {{#users}} section.
{{/users}} // This is a standard {{/users}} section.
`;

const data = {
  users: [
    { name: "Alice" },
    { name: "Bob" }
  ],
  products: [],
  emptyArray: [],
  isAdmin: true,
  isUser: false
};

// --- Выполнение рендеринга ---
const html = Mustache.render(template, data);
console.log(html);