pOTS.js

const pOTS=(o)=> {
    if (!o) return null;
    let str="",na=0,k,p;
    if (typeof(o) == "object") {
        if (!pOTS.check) pOTS.check = new Array();
        for (k=pOTS.check.length;na<k;na++) if (pOTS.check[na]==o) return '{}';
        pOTS.check.push(o);
    }
    k="",na=typeof(o.length)=="undefined"?1:0;
    for(p in o){
        if (na) k = "'"+p+"':";
        if (typeof o[p] == "string") str += k+"'"+o[p]+"',";
        else if (typeof o[p] == "object") str += k+pOTS(o[p])+",";
        else str += k+o[p]+",";
    }
    if (typeof(o) == "object") pOTS.check.pop();
    if (na) return "{"+str.slice(0,-1)+"}";
    else return "["+str.slice(0,-1)+"]";
}