jose/dist/webapi/lib/is_disjoint.js

JWA, JWS, JWE, JWT, JWK, JWKS for Node.js, Browser, Cloudflare Workers, Deno, Bun, and other Web-interoperable runtimes

export function isDisjoint(...headers) {
    const sources = headers.filter(Boolean);
    if (sources.length === 0 || sources.length === 1) {
        return true;
    }
    let acc;
    for (const header of sources) {
        const parameters = Object.keys(header);
        if (!acc || acc.size === 0) {
            acc = new Set(parameters);
            continue;
        }
        for (const parameter of parameters) {
            if (acc.has(parameter)) {
                return false;
            }
            acc.add(parameter);
        }
    }
    return true;
}