Build and Encode Custom URLs Online URL Builder tool for network operations.

Under the hood, it relies on client-side JavaScript and browser APIs to construct a valid URL. The tool utilizes the `useState` and `useMemo` React hooks to manage its state and compute the built URL, respectively. When building the URL, it follows established standards and RFCs, such as RFC 3986, to ensure correctness. Input validation is performed using regular expressions, checking for edge cases like spaces in the hostname or invalid port numbers. The `encodeURIComponent` function is used to properly encode query parameter names and values, preventing errors due to special characters. Additionally, it employs ES6+ features, such as destructuring and arrow functions, to simplify its codebase. Mobile-first responsive design principles are also applied to ensure a seamless user experience across various devices.

The tool's UI components, including `InputWithHelp` and `SelectWithHelp`, are built using React, which provides an efficient way to manage the component tree and handle user interactions. The `useCallback` hook is used to memoize functions like `addParam`, `removeParam`, and `updateParam`, preventing unnecessary re-renders and improving performance. When handling query parameters, it uses a data structure consisting of an array of objects, where each object represents a parameter with its key, value, and unique ID. This allows for efficient addition, removal, and updating of parameters. The `copyToClipboard` function from the `@/lib/utils` module is used to copy the built URL to the user's clipboard, providing a convenient way to use the generated URL in other applications.