How to reliably hash JavaScript objects?

You might be interested in npm package object-hash, which seems to have a rather good activity & reliability level.

var hash = require('object-hash');

var testobj1 = {a: 1, b: 2};
var testobj2 = {b: 2, a: 1};
var testobj3 = {b: 2, a: "1"};

console.log(hash(testobj1)); // 214e9967a58b9eb94f4348d001233ab1b8b67a17
console.log(hash(testobj2)); // 214e9967a58b9eb94f4348d001233ab1b8b67a17
console.log(hash(testobj3)); // 4a575d3a96675c37ddcebabd8a1fea40bc19e862