Create DKIM DNS Records for Email Authentication Generate DKIM DNS TXT records for email signing.

The tool works under the hood by using React state management to store user input values such as selector, domain name, key type, and public key. When the generate button is clicked, it triggers a useCallback function that removes unnecessary characters from the public key using regular expressions, replacing strings like "-----[^-]+-----" with an empty string and removing whitespace characters. The output DKIM record is then constructed by concatenating the selector, domain name, and formatted public key into a string in the format "selector._domainkey.domain IN TXT v=DKIM1; k=keyType; p=publicKey". This string is set as the output state value.

The tool uses TypeScript for type checking and utilizes React hooks like useState to manage component state. It also relies on browser APIs, specifically the clipboard API, through a utility function called copyToClipboard to handle copying the generated DKIM record to the user's clipboard when the copy button is clicked. The copied status is tracked using another state variable, which triggers a timeout to reset the status after 2 seconds. When generating the DKIM record, it supports both RSA and Ed25519 key types by including the chosen type in the output string.

The React component renders an interface with input fields for selector, domain name, and public key, as well as buttons for selecting the key type and generating the DKIM record. The generated output is displayed in a textarea with a copy button next to it, allowing users to easily publish their DKIM records as DNS TXT entries. This process involves using JavaScript's JSON.stringify function to properly format the DKIM parameters into a string that can be used directly in DNS configuration files or online management interfaces for email verification purposes.