Select Page

How to Use window.crypto in Node.js

David Walsh
Published: October 27, 2022

I’ve been writing a bunch of jest tests recently for libraries that use the underlying window.crypto methods like getRandomValues() and window.crypto.subtle key management methods. One problem I run into is that the window.crypto object isn’t available, so I need to shim it.

To use the window.crypto methods, you will need Node 15+. You can set the window.crypto by importing the crypto package and setting it on the global:

const crypto = require('crypto').webcrypto;
// Shims the crypto property onto global
global.crypto = crypto;

I really loathe creating mock functions for missing libraries in Node because they can lead to faulty positives on tests; I really appreciate webcrypto being available!

  • Adding Events to Adding Events in MooTools

    Note: This post has been updated. One of my huge web peeves is when an element has click events attached to it but the element doesn’t sport the “pointer” cursor. I mean how the hell is the user supposed to know they can/should click on…

  • Facebook Open Graph META Tags

    It’s no secret that Facebook has become a major traffic driver for all types of websites.  Nowadays even large corporations steer consumers toward their Facebook pages instead of the corporate websites directly.  And of course there are Facebook “Like” and “Recommend” widgets on every website.  One…



Source: davidwalsh.name