@authlocal/authlocal/x/auth/utils/crush-username.js

User-sovereign Logins For All

import { maxNameLength } from "./validation.js";
/** convert a username into a string that is url friendly and filename friendly */
export function crushUsername(username, maxLength = maxNameLength) {
    const sanitized = username
        .toLowerCase()
        .replace(/[^a-z0-9]/gi, "_")
        .slice(0, maxLength)
        .replace(/^_+|_+$/g, "");
    return sanitized || "passport";
}
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