how to get distinct permutations of a set in typescript

index.ts
function getPermutations(set: Set<any>): any[][] {
    const result = [];
    const inputArr = Array.from(set);

    function permute(arr: any[], m: any[] = []): void {
        if (arr.length === 0) {
            result.push(m);
        } else {
            for (let i = 0; i < arr.length; i++) {
                const curr = arr.slice();
                const next = curr.splice(i, 1);
                permute(curr.slice(), m.concat(next));
            }
        }
    }

    permute(inputArr);

    const distinctResult = [];
    const strResult = [];

    // stringify permutations to identify and remove duplicates
    for (let i = 0; i < result.length; i++) {
        const str = JSON.stringify(result[i]);
        if (!strResult.includes(str)) {
            strResult.push(str);
            distinctResult.push(result[i]);
        }
    }

    return distinctResult;
}
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