Tell me about micro frontends: why are they needed and how do you work with them?

Microfrontends are an architectural approach where a frontend application is divided into independent, isolated parts that can be developed, deployed, and updated separately. This helps scale teams, reduce dependencies, and accelerate releases.

Why microfrontends are needed:

• Responsibility sharing between teams.
• Ability to use different technologies in different parts of the application.
• Reduced risk during deployment — only part of the interface is updated.
• Improved support and scalability of large projects.

How I work with microfrontends:

• Define boundaries and responsibilities for each microfrontend.
• Use common standards and contracts (e.g., through events or APIs).
• For integration, I use approaches like iframe, Web Components, or modular loaders.
• Set up CI/CD for independent deployment of each microfrontend.

Example of a simple microfrontend using Web Components:

class UserProfile extends HTMLElement {
  connectedCallback() {
    this.innerHTML = `<div>User profile</div>`;
  }
}
customElements.define('user-profile', UserProfile);

This component can be used in the main application as <user-profile></user-profile>, and it is developed and deployed separately.