Front-End Developer interview questions

I have extensive experience with HTML, CSS, and JavaScript, having used them to create and style web pages in many of my previous projects. I'm proficient in writing clean and efficient code and utilizing various frameworks and libraries.

I collaborate closely with designers to understand their requirements and provide feedback on potential technical limitations. By doing so, I ensure that the designs are not only visually appealing but also practically implementable and optimized for performance.

Responsive design uses flexible layouts, images, and CSS media queries to adjust content dynamically across different screen sizes. Adaptive design, on the other hand, uses fixed layouts that change at specific breakpoints, offering a more tailored experience for different devices.

I use various techniques such as minimizing HTTP requests, optimizing images, minifying CSS and JavaScript files, leveraging browser caching, and utilizing content delivery networks (CDNs) to reduce load times and enhance user experience.

I'm familiar with several JavaScript frameworks, including React, Angular, and Vue.js. I've used these frameworks to build robust, dynamic, and interactive user interfaces in various projects.

To handle browser compatibility issues, I use progressive enhancement, polyfills, and tools like Babel to ensure my code runs smoothly across different browsers. I also perform thorough testing and validation using tools like BrowserStack.

I use browser developer tools such as Chrome DevTools, Firefox Developer Edition, and extensions like React Developer Tools to debug and troubleshoot front-end code. These tools help me inspect elements, monitor network activity, and diagnose performance issues.

In React applications, I use the built-in useState and useReducer hooks for local component state management. For global state management, I often utilize libraries like Redux or the Context API, depending on the complexity of the application's requirements.

I have extensive experience using Git for version control. I use it to track changes, collaborate with team members, and manage codebase history effectively. I'm also comfortable using platforms like GitHub and GitLab for code review and project collaboration.

My approach to testing involves using a combination of unit, integration, and end-to-end tests. I apply testing frameworks like Jest and tools like React Testing Library for unit and integration testing, and I use tools like Cypress and Selenium for end-to-end testing to ensure that all components function as expected.