Look Up MIME Types by File Extension MIME Type Reference tool for network operations.

The tool's core functionality relies on a predefined array of mime type objects, where each object contains the file extension, corresponding MIME type string, and category. This data structure is then filtered using the `useMemo` hook from React, which recalculates the filtered list whenever the search query or filter category changes. The filtering algorithm checks for matches between the search input and both the file extension and MIME type string, allowing users to find specific mime types quickly. Under the hood, it utilizes JavaScript's built-in `filter` method and `includes` string method to perform these searches.

When a user interacts with the tool, such as typing in the search bar or clicking on a filter button, React's state management comes into play through the `useState` hook. This hook maintains the current search query and selected filter category in memory, which are then used by the filtering algorithm. The resulting filtered list is rendered as an HTML table using React components, with each row representing a single mime type object. The tool also handles cases where no matching mime types are found, displaying a message to inform the user.

In terms of specific technologies, the code uses modern JavaScript features like ES6+ syntax and React hooks for managing state and side effects. The `InputWithHelp` component is used for rendering the search bar with a hint, showcasing how custom components can be integrated into the tool's interface. Additionally, the use of CSS classes for styling demonstrates how presentation logic is separated from the underlying JavaScript code, making it easier to maintain and customize the tool's appearance. Overall, the combination of React, JavaScript, and HTML/CSS enables the tool to provide a dynamic and user-friendly experience for looking up mime types.