In this part we return to the frontend, first looking at different possibilities for testing the React code. We will also implement token based authentication which will enable users to log in to our application.

Section updated 21st August 2025

• React version updated from v18 to v19. PropTypes and forwardRef has deprecated
• A label element has been added to the login form fields and used later in tests to identify the fields
• .eslintrc.cjs replaced with eslint.config.js file
• .eslintignore replaced with configuration in eslint.config.js