@twurple/chat/es/utils/userUtil.mjs

Interact with the Twitch Messaging Interface (aka Twitch chat).

// valid names must be alphanumberic or underscores between 1 and 25 characters (cannot start with underscore)
const validNames = /^[a-z0-9][a-z0-9_]{0,24}$/;
/**
 * Converts a chat-compatible channel name to an API-compatible username.
 *
 * @param channel The name of the channel.
 */
export function toUserName(channel) {
    // it's okay if this is already a username, we only remove the first character if it's a pound
    const name = channel.replace(/^#/, '').toLowerCase();
    if (!validNames.test(name)) {
        throw new Error(`"${name}" is not a valid user or channel name. It must be at most 25 characters long, can only include letters, numbers and underscores, and can not start with an underscore.`);
    }
    return name;
}
/**
 * Converts an API-compatible username to a chat-compatible channel name.
 *
 * @param user The name of the user.
 */
export function toChannelName(user) {
    // remove leading pound first - in case it already is a channel name
    return `#${toUserName(user)}`;
}