@safeapi/safeapi/dist/shared/deepFreeze.js

SafeAPI: Secure, deterministic, and tamper-resistant API policy engine for Node and browser.

/** @internal */
export function deepFreeze(value, seen = new WeakSet()) {
    if (value === null || typeof value !== "object") {
        return value;
    }
    const reference = value;
    if (seen.has(reference)) {
        return reference;
    }
    seen.add(reference);
    if (Array.isArray(value)) {
        for (const item of value) {
            deepFreeze(item, seen);
        }
    }
    else {
        const record = value;
        for (const key of Object.keys(record)) {
            deepFreeze(record[key], seen);
        }
    }
    return Object.freeze(value);
}