@testing-library/jest-dom provides custom Jest matchers that extend Jest and improve testing of React components rendered with React Testing Library. These matchers assert various DOM states, letting you easily verify if elements are visible, have specific content, possess certain attributes, or are enabled/disabled. It simplifies writing legible and maintainable UI tests, focusing on user-centric testing and avoiding implementation details. The package promotes testing the behavior and appearance of components the way users would perceive them, helping you catch regressions and improve the overall quality of your application.
