es-toolkit/dist/map/filter.mjs

A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.

function filter(map, callback) {
    const result = new Map();
    for (const [key, value] of map) {
        if (callback(value, key, map)) {
            result.set(key, value);
        }
    }
    return result;
}

export { filter };