My Circular Structure testing in JavaScript. https://repl.it/JnYY/0

CircularStructures.js

const i = {};
i.i = i;
console.log(i);

function I() {
  this.i = this;
}

const functionI = new I();
console.log(functionI);

const getterI = {};
Object.defineProperty(getterI, "i", {
  enumerable: true,
  get: function returnSelf() {
    return this;
  }.bind(getterI),
});
console.log(getterI);

const circularTest = {};

circularTest.a = {};
circularTest.b = { hello: "hello" };
circularTest.a.b = circularTest.b;
circularTest.b.a = circularTest.a;
console.log(circularTest);

let circularObjects = [i, functionI, getterI, circularTest];
let promises = circularObjects.map(i => {
  return new Promise((resolve, reject) => 
    resolve(JSON.stringify(i)))
      .then(console.log)
      .catch(reason => {
        console.log(i);
        console.error(reason);
      });
});