Get `Object.prototype.toString()` to return JSON string without circular reference error

Object.prototype.toString.js

Object.defineProperty(Object.prototype, "toString", {
	value: function () {
		return JSON.stringify(
			this,
			(function () {
				const ancestors = [];
				return function (key, value) {
					if (typeof value !== "object" || value === null) {
						return value;
					}
					while (ancestors.length > 0 && ancestors.at(-1) !== this) {
						ancestors.pop();
					}
					if (ancestors.includes(value)) {
						return "[Circular]";
					}
					ancestors.push(value);
					return value;
				};
			})()
		);
	}
});