a JavaScript Map that compares keys by equality and not by reference LUL

mymap.js

function MyMap(){
  this.map = new Map();
}

MyMap.prototype.set= function(k,v){
  this.map.set(JSON.stringify(k), v);
}
MyMap.prototype.get= function(k){
  return this.map.get(JSON.stringify(k));
}
MyMap.prototype.has= function (k){
  this.map.has(JSON.stringify(k));
}
MyMap.prototype.forEach= function(f){
  this.map.forEach((v,k,map)=>{
    f(v, JSON.parse(k), map);
  });
}

let m = new MyMap()
m.set([0,1],89);

console.log( m.get([0,1]))